NUVEEN TAX EXEMPT UNIT TRUST SERIES 798
497, 1995-04-26
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<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     MARYLAND
     TRUST 306
              (MARYLAND TRADITIONAL TRUST 306)
 
            Estimated Current Return
            5.41% to 5.63%
            as of 04/24/95
 
            Estimated Long Term Return
            5.44% to 5.66%
             35,000 units in a
             diversified $3,500,000
             portfolio of tax-exempt
             bonds
                  Cusip:
                  67102E 105 Monthly Payment Option
                  67102E 113 Quarterly Payment Option
                  67102E 121 Semi-Annual Payment Option
 
                  Registered in Maryland
                    John Nuveen & Co. Incorporated
                    Investment Bankers
 
<TABLE>
<S>                           <C>
Chicago:                      Atlanta
333 W. Wacker Dr.             Austin
Chicago, Illinois 60606       Boca Raton
Telephone: 312.917.7700       Boston
                              Columbus
New York:                     Dallas/Ft. Worth
Swiss Bank Tower              Irvine
10 East 50th Street           Philadelphia
New York, New York 10022      Phoenix
Telephone: 212.207.2000       San Francisco
                              Seattle
                              Tampa
                              Washington, D.C.
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
 
NUVEEN TAX-EXEMPT UNIT TRUST--MARYLAND TRADITIONAL TRUST 306
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT APRIL 25, 1995
- --------------------------------------------------------------------------------
 
   
<TABLE>
<CAPTION>
                                                                                                             Ratings
                                                                                    Optional         -----------------------
  Aggregate            Name of Issuer and Title of Issue Represented               Redemption        Standard
  Principal               by Sponsor's Contracts to Purchase Bonds                 Provisions        & Poor's       Moody's
  <C>       <C> <S>                                                              <C>                 <C>           <C>
  --------------------------------------------------------------------------------------------------------------------------
  $  500,000    Community Development Administration, Department of Housing        2003 at 102          --            Aa
                  and Community Development, State of Maryland, Multi-Family
                  Housing Revenue Bonds (Insured Mortgage Loans), 1993
                  Series D, 6.05% Due 5/15/24.
     500,000    Maryland Health and Higher Educational Facilities Authority,       2003 at 102           A            A1
                  Refunding Revenue Bonds, Suburban Hospital Issue, Series
                  1993, 5.125% Due 7/1/21. (Original issue discount bonds
                  delivered on or about October 14, 1993 at a price of
                  94.689% of principal amount.)
     500,000    Maryland Health and Higher Educational Facilities Authority,       2003 at 100          AAA           Aaa
                  Project and Refunding Revenue Bonds, University of
                  Maryland Medical System Issue, Series 1993, 5.00% Due
                  7/1/20. (Original issue discount bonds delivered on or
                  about June 24, 1993 at a price of 90.125% of principal
                  amount.)(FGIC Insured.)
     500,000    Anne Arundel County, Maryland, Consolidated General                2005 at 101          AA+           Aa
                  Improvement Bonds, Series 1995, 6.30% Due 8/1/23. (General
                  Obligation Bonds.)
     500,000    Anne Arundel County, Maryland, Pollution Control Revenue           2004 at 102           A            A2
                  Refunding Bonds (Baltimore Gas and Electric Company
                  Project), Series 1994, 6.00% Due 4/1/24.
     500,000    City of Baltimore, Maryland (Mayor and City Council of             2004 at 100          AAA           Aaa
                  Baltimore), Convention Center Revenue Bonds, Series 1994,
                  6.15% Due 9/1/19. (FGIC Insured.)
     500,000    Commonwealth of Puerto Rico, Public Improvement Refunding          2003 at 100          AAA           Aaa
                  Bonds, Series 1993 (General Obligation Bonds.), 5.00% Due
                  7/1/21. (Original issue discount bonds delivered on or
                  about July 15, 1993 at a price of 90.01% of principal
                  amount.)(MBIA Insured.)
  ----------
  $3,500,000
  ----------
  ----------
</TABLE>
    
 
<PAGE>
- --------------------------------------------------------------------------------
UNIT PRICE, ESTIMATED CURRENT RETURN AND ESTIMATED LONG TERM RETURN DEPEND ON
AMOUNT PURCHASED AND PAYMENT OPTION    The sales charges/volume discounts below
apply on all concurrent purchases of any Nuveen trust units, unless any such
purchases are made by a class of investors for which a separate sales charge is
applicable as described more fully in the Prospectus. Estimated Current Return
equals net income divided by offering price. Estimated Long Term Return
represents an average of the yields to maturity (or call) of the Bonds in the
Trust adjusted to reflect expenses and sales charges.
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                          Estimated Current Return (2)
                                                              -----------------------------------------------------
          AMOUNT PURCHASED                         Public
- -------------------------------------  Sales      Offering          Monthly         Quarterly       Semi-Annual
     Units              Dollars        Charge     Price (1)         Payment          Payment          Payment
- ----------------  -------------------  ------    -----------     -------------    -------------    -------------
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
50-499                 $5,000-$49,999   4.90 %   $    100.69          5.41%            5.44%            5.46%
500-999                 50,000-99,999   4.75          100.54          5.42             5.45             5.47
1,000-2,499           100,000-249,999   4.50          100.27          5.43             5.47             5.49
2,500-4,999           250,000-499,999   4.25          100.01          5.45             5.48             5.50
5,000-9,999           500,000-999,999   3.50           99.23          5.49             5.52             5.54
10,000-24,999     1,000,000- 2,499,999  3.00           98.72          5.52             5.55             5.57
25,000-49,999     2,500,000- 4,999,999  2.50           98.22          5.55             5.58             5.60
50,000 and over    5,000,000 and over   2.00           97.71          5.58             5.61             5.63
</TABLE>
 
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                         Estimated Long Term Return (3)
                                                              -----------------------------------------------------
          AMOUNT PURCHASED                         Public
- -------------------------------------  Sales      Offering          Monthly         Quarterly       Semi-Annual
     Units              Dollars        Charge     Price (1)         Payment          Payment          Payment
- ----------------  -------------------  ------    -----------     -------------    -------------    -------------
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
50-499                 $5,000-$49,999   4.90 %   $    100.69          5.44%            5.48%            5.49%
500-999                 50,000-99,999   4.75          100.54          5.45             5.48             5.49
1,000-2,499           100,000-249,999   4.50          100.27          5.46             5.50             5.51
2,500-4,999           250,000-499,999   4.25          100.01          5.47             5.51             5.52
5,000-9,999           500,000-999,999   3.50           99.23          5.52             5.56             5.57
10,000-24,999     1,000,000- 2,499,999  3.00           98.72          5.55             5.59             5.60
25,000-49,999     2,500,000- 4,999,999  2.50           98.22          5.58             5.62             5.63
50,000 and over    5,000,000 and over   2.00           97.71          5.61             5.65             5.66
</TABLE>
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
(1) As of the business day prior to the Date of Deposit. Units are offered at
    the Public Offering Price plus accrued interest.
(2) All figures as of the business day prior to Date of Deposit. The estimated
    current return for purchases made on such date will be as shown, as long as
    the portfolio size and composition remain the same.
(3) In contrast to Estimated Current Return, Estimated Long Term Return reflects
    the amortization of premium or accretion of discount, if any, on the bonds
    in the Trust's portfolio.
 
- --------------------------------------------------------------------------------
 
INTEREST DISTRIBUTIONS TO UNITHOLDERS   Unitholders may elect to have interest
distributions made on a monthly, quarterly, or semi-annual basis. Record Dates
are May 1 and November 1 for semi-annual distributions; February 1, May 1,
August 1 and November 1 for quarterly distributions; and the first of each month
for monthly distributions. Details of interest distributions per unit under the
various plans appear in the following table based upon estimated net annual
interest income at the Date of Deposit:
- --------------------------------------------------------------------------------
 
   
<TABLE>
<CAPTION>
                                                                                                                       Normal
                                                                                                                   Distributions
Maryland Traditional Trust                               1995                                  1996                  per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>            <C>
- -------------------------------------------------------------------------------------------------------------      --------------
Record Date*..........................        6/1            8/1           11/1            2/1            5/1
Distribution Date.....................       6/15           8/15          11/15           2/15           5/15
- ---------------------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .5446(1)                                                               $  5.4490
                                                             --------    $.4539 every month    --------
Quarterly Distribution Plan...........  $   .5446(1)   $   .9132(2)   $  1.3698      $  1.3698      $  1.3698      $  5.4810
Semi-Annual Distribution Plan.........  $   .5446(1)                  $  2.2905(3)                  $  2.7486      $  5.5000
- ---------------------------------------------------------------------------------------------------------------------------------
<FN>
  * Record Dates for semi-annual distributions are May 1 and November 1; for quarterly distributions, they are February 1, May 1,
    August 1 and November 1. Record Dates for monthly distributions are the first day of each month.
(1) The first distribution will be paid to all Unitholders, regardless of the distribution plan selected. Such distribution may
    be more or less than a regular monthly distribution.
(2) The second distribution under the quarterly distribution plan represents a 2-month distribution; subsequent quarterly
    distributions will be regular 3-month distributions.
(3) The second distribution under the semi-annual distribution plan represents a 5-month distribution; subsequent semi-annual
    distributions will be regular 6-month distributions.
</TABLE>
    
 
+ Interest for Unitholders of this series began to accrue as of the Date of
Deposit. Units purchased on the Date of Deposit will have $.11 of accrued
interest that will be added to the Public Offering Price on the Settlement Date.
After provision for expenses of the Fund, the daily rate of accrual from the
Date of Deposit to the first Record Date is $.01513 per unit per day.
Consequently, on the first Record Date (06/01/95), accrued interest will total
$0.5446 per unit for the 36-day period. All interest accrued from the Date of
Deposit to the first Record Date, less expenses, will be distributed on the
first Distribution Date to Unitholders of Record as of the first Record Date.
The first payment to all Unitholders of Record on 06/01/95 is $.5446 per unit.
After the first Record Date daily rates of accrual are:
              Monthly - $0.01513              Quarterly - $0.01522
                             Semi-Annual - $0.01527
This daily rate of accrual, and the annual distributions shown above, will
remain the same as long as the portfolio size and composition remain the same.
 
- --------------------------------------------------------------------------------
 
                                                          798
<PAGE>
- -------------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 26.9 years.
The first bond is scheduled to mature in September, 2019, with the last bond
maturity being May, 2024.
 
- -------------------------------------------------------
 
QUALITY OF PORTFOLIO AS RATED BY
STANDARD & POOR'S CORPORATION
OR MOODY'S INVESTORS SERVICES
- -------------------------------------------------------
 
<TABLE>
<S>                       <C>                    <C>
Rating                    Percent of Portfolio
Category                  Par Value
- --------------------------------------------------------------------
AAA                           43%
AA                            29
A1/A+                         14
A                             14
                             ---
                             100%
</TABLE>
 
- -------------------------------------------------------
 
CALL PROTECTION   Bonds are first subject to optional redemption by the issuers
in the years and at the prices shown under the Redemption Provisions column in
the Schedule of Investments. Unless otherwise stated, in subsequent years, bonds
are redeemable at declining prices, but not usually below par value. Some issues
or some portions of issues may also be subject to sinking fund redemption or
extraordinary redemption without premium prior to the dates shown.
 
- -------------------------------------------------------
 
NO CHARGE FOR REDEMPTION   The Trustee, United States Trust Company of New York,
will redeem units at net asset value. In addition, John Nuveen & Co.
Incorporated intends to maintain a secondary market for this Nuveen Tax-Exempt
Unit Trust. Inasmuch as all securities investments are subject to market price
fluctuation, net asset value at the time of redemption could be more or less
than the initial investment.
 
- -------------------------------------------------------
 
REINVESTMENT OPTIONS   Specify automatic reinvestment of trust income, with no
sales charge, to earn compounded dividends with Nuveen mutual funds.
 
- -------------------------------------------------------
 
UNITS OF THE TRUST ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY BANK AND ARE NOT FEDERALLY INSURED OR OTHERWISE PROTECTED BY THE FEDERAL
DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER AGENCY AND
INVOLVE INVESTMENT RISK, INCLUDING THE POSSIBLE LOSS OF PRINCIPAL.
 
- -------------------------------------------------------
 
FOR A PROSPECTUS CONTAINING MORE COMPLETE INFORMATION, INCLUDING CHARGES AND
EXPENSES, ON THIS NUVEEN TAX-EXEMPT UNIT TRUST AND ANY OTHER NUVEEN FUND, CALL
YOUR BROKER . . . OR NUVEEN AT
 
                                 1-800-257-8787
 
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.
<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     CALIFORNIA
     INSURED
     TRUST 246
 
            Estimated Current Return
            5.37% to 5.59%
            as of 04/24/95
 
            Estimated Long Term Return
            5.49% to 5.70%
             40,000 units in a
             diversified $4,000,000
             portfolio of tax-exempt
             bonds rated "AAA"
                  Cusip:
                  67064U 857 Monthly Payment Option
                  67064U 865 Quarterly Payment Option
                  67064U 873 Semi-Annual Payment Option
 
                  Registered in California
                    John Nuveen & Co. Incorporated
                    Investment Bankers
 
<TABLE>
<S>                           <C>
Chicago:                      Atlanta
333 W. Wacker Dr.             Austin
Chicago, Illinois 60606       Boca Raton
Telephone: 312.917.7700       Boston
                              Columbus
New York:                     Dallas/Ft. Worth
Swiss Bank Tower              Irvine
10 East 50th Street           Philadelphia
New York, New York 10022      Phoenix
Telephone: 212.207.2000       San Francisco
                              Seattle
                              Tampa
                              Washington, D.C.
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
 
NUVEEN TAX-EXEMPT UNIT TRUST--INSURED, CALIFORNIA INSURED TRUST 246
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT APRIL 25, 1995
- --------------------------------------------------------------------------------
 
   
<TABLE>
<CAPTION>
                                                                                                             Ratings
                                                                                    Optional         -----------------------
  Aggregate            Name of Issuer and Title of Issue Represented               Redemption        Standard
  Principal               by Sponsor's Contracts to Purchase Bonds                 Provisions        & Poor's       Moody's
  <C>       <C> <S>                                                              <C>                 <C>           <C>
  --------------------------------------------------------------------------------------------------------------------------
  $  500,000    State of California, Various Purpose General Obligation            2004 at 102          AAA           Aaa
                  Bonds, 6.00% Due 8/1/20.
     500,000    California Statewide Communities Development Authority,            2003 at 102          AAA           Aaa
                  Insured Health Facilities Revenue Certificates of
                  Participation (UniHealth America), 1993 Series A, 5.50%
                  Due 10/1/14.
     500,000    The Regents of the University of California, Refunding             2003 at 102          AAA           Aaa
                  Revenue Bonds (Multiple Purpose Projects), Series C, 4.75%
                  Due 9/1/15. (Original issue discount bonds delivered on or
                  about January 27, 1994 at a price of 93.581% of principal
                  amount.)
     500,000    Brea Public Financing Authority (California), 1995 Lease           2005 at 102          AAA           Aaa
                  Revenue Bonds (Brea Community Center Project), 6.00% Due
                  7/1/21. (When issued.)
     500,000    Department of Water and Power of The City of Los Angeles,          2003 at 102          AAA           Aaa
                  California, Electric Plant Refunding Revenue Bonds, Second
                  Issue of 1993, 5.40% Due 11/15/31.
     500,000    The City of Los Angeles, California, Wastewater System             2004 at 102          AAA           Aaa
                  Revenue Bonds, Series 1994-A, 5.875% Due 6/1/24.
     500,000    Santa Clara County Board of Education (California), 1995           2003 at 102          AAA           Aaa
                  Series A Certificates of Participation (Administration
                  Building Project), 6.00% Due 4/1/20.
     500,000    Southern California Public Power Authority, Transmission           2003 at 100          AAA           Aaa
                  Project Revenue Bonds, 1993 Subordinate Refunding Series
                  (Southern Transmission Project), 4.75% Due 7/1/23.
                  (Original issue discount bonds delivered on or about July
                  29, 1993 at a price of 88.502% of principal amount.)
  ----------
  $4,000,000
  ----------
  ----------
</TABLE>
    
 
<PAGE>
- --------------------------------------------------------------------------------
UNIT PRICE, ESTIMATED CURRENT RETURN AND ESTIMATED LONG TERM RETURN DEPEND ON
AMOUNT PURCHASED AND PAYMENT OPTION    The sales charges/volume discounts below
apply on all concurrent purchases of any Nuveen trust units, unless any such
purchases are made by a class of investors for which a separate sales charge is
applicable as described more fully in the Prospectus. Estimated Current Return
equals net income divided by offering price. Estimated Long Term Return
represents an average of the yields to maturity (or call) of the Bonds in the
Trust adjusted to reflect expenses and sales charges.
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                          Estimated Current Return (2)
                                                              -----------------------------------------------------
          AMOUNT PURCHASED                         Public
- -------------------------------------  Sales      Offering          Monthly         Quarterly       Semi-Annual
     Units              Dollars        Charge     Price (1)         Payment          Payment          Payment
- ----------------  -------------------  ------    -----------     -------------    -------------    -------------
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
50-499                 $5,000-$49,999   4.90 %   $     98.86          5.37%            5.40%            5.42%
500-999                 50,000-99,999   4.75           98.71          5.38             5.41             5.43
1,000-2,499           100,000-249,999   4.50           98.45          5.39             5.43             5.45
2,500-4,999           250,000-499,999   4.25           98.19          5.41             5.44             5.46
5,000-9,999           500,000-999,999   3.50           97.43          5.45             5.48             5.50
10,000-24,999     1,000,000- 2,499,999  3.00           96.93          5.48             5.51             5.53
25,000-49,999     2,500,000- 4,999,999  2.50           96.43          5.51             5.54             5.56
50,000 and over    5,000,000 and over   2.00           95.94          5.54             5.57             5.59
</TABLE>
 
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                         Estimated Long Term Return (3)
                                                              -----------------------------------------------------
          AMOUNT PURCHASED                         Public
- -------------------------------------  Sales      Offering          Monthly         Quarterly       Semi-Annual
     Units              Dollars        Charge     Price (1)         Payment          Payment          Payment
- ----------------  -------------------  ------    -----------     -------------    -------------    -------------
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
50-499                 $5,000-$49,999   4.90 %   $     98.86          5.49%            5.52%            5.54%
500-999                 50,000-99,999   4.75           98.71          5.49             5.52             5.54
1,000-2,499           100,000-249,999   4.50           98.45          5.51             5.54             5.56
2,500-4,999           250,000-499,999   4.25           98.19          5.52             5.55             5.57
5,000-9,999           500,000-999,999   3.50           97.43          5.57             5.60             5.62
10,000-24,999     1,000,000- 2,499,999  3.00           96.93          5.60             5.63             5.65
25,000-49,999     2,500,000- 4,999,999  2.50           96.43          5.63             5.66             5.68
50,000 and over    5,000,000 and over   2.00           95.94          5.66             5.68             5.70
</TABLE>
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
(1) As of the business day prior to the Date of Deposit. Units are offered at
    the Public Offering Price plus accrued interest.
(2) All figures as of the business day prior to Date of Deposit. The estimated
    current return for purchases made on such date will be as shown, as long as
    the portfolio size and composition remain the same.
(3) In contrast to Estimated Current Return, Estimated Long Term Return reflects
    the amortization of premium or accretion of discount, if any, on the bonds
    in the Trust's portfolio.
 
- --------------------------------------------------------------------------------
 
INTEREST DISTRIBUTIONS TO UNITHOLDERS   Unitholders may elect to have interest
distributions made on a monthly, quarterly, or semi-annual basis. Record Dates
are May 1 and November 1 for semi-annual distributions; February 1, May 1,
August 1 and November 1 for quarterly distributions; and the first of each month
for monthly distributions. Details of interest distributions per unit under the
various plans appear in the following table based upon estimated net annual
interest income at the Date of Deposit:
- --------------------------------------------------------------------------------
 
   
<TABLE>
<CAPTION>
                                                                                                                       Normal
                                                                                                                   Distributions
California Insured Trust                                 1995                                  1996                  per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>            <C>
- -------------------------------------------------------------------------------------------------------------      --------------
Record Date*..........................        6/1            8/1           11/1            2/1            5/1
Distribution Date.....................       6/15           8/15          11/15           2/15           5/15
- ---------------------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .5310(1)                                                               $  5.3109
                                                             --------    $.4425 every month    --------
Quarterly Distribution Plan...........  $   .5310(1)   $   .8904(2)   $  1.3356      $  1.3356      $  1.3356      $  5.3429
Semi-Annual Distribution Plan.........  $   .5310(1)                  $  2.2335(3)                  $  2.6802      $  5.3619
- ---------------------------------------------------------------------------------------------------------------------------------
<FN>
  * Record Dates for semi-annual distributions are May 1 and November 1; for quarterly distributions, they are February 1, May 1,
    August 1 and November 1. Record Dates for monthly distributions are the first day of each month.
(1) The first distribution will be paid to all Unitholders, regardless of the distribution plan selected. Such distribution may
    be more or less than a regular monthly distribution.
(2) The second distribution under the quarterly distribution plan represents a 2-month distribution; subsequent quarterly
    distributions will be regular 3-month distributions.
(3) The second distribution under the semi-annual distribution plan represents a 5-month distribution; subsequent semi-annual
    distributions will be regular 6-month distributions.
</TABLE>
    
 
+ Interest for Unitholders of this series began to accrue as of the Date of
Deposit. Units purchased on the Date of Deposit will have $.10 of accrued
interest that will be added to the Public Offering Price on the Settlement Date.
After provision for expenses of the Fund, the daily rate of accrual from the
Date of Deposit to the first Record Date is $.01475 per unit per day.
Consequently, on the first Record Date (06/01/95), accrued interest will total
$0.5310 per unit for the 36-day period. All interest accrued from the Date of
Deposit to the first Record Date, less expenses, will be distributed on the
first Distribution Date to Unitholders of Record as of the first Record Date.
The first payment to all Unitholders of Record on 06/01/95 is $.5310 per unit.
After the first Record Date daily rates of accrual are:
              Monthly - $0.01475              Quarterly - $0.01484
                             Semi-Annual - $0.01489
This daily rate of accrual, and the annual distributions shown above, will
remain the same as long as the portfolio size and composition remain the same.
 
- --------------------------------------------------------------------------------
 
                                                          798
<PAGE>
- -------------------------------------------------------
 
AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 26.3 years.
The first bond is scheduled to mature in October, 2014, with the last bond
maturity being November, 2031.
 
- -------------------------------------------------------
 
BONDS INSURED BY MBIA   Each bond in this Nuveen Insured series has been
insured* by the Municipal Bond Investors Assurance Corporation, which guarantees
timely payments of principal and interest. Premium payments have been fully paid
by the Date of Deposit.
 
- -------------------------------------------------------
 
CALL PROTECTION   Bonds are first subject to optional redemption by the issuers
in the years and at the prices shown under the Redemption Provisions column in
the Schedule of Investments. Unless otherwise stated, in subsequent years, bonds
are redeemable at declining prices, but not usually below par value. Some issues
or some portions of issues may also be subject to sinking fund redemption or
extraordinary redemption without premium prior to the dates shown.
 
- -------------------------------------------------------
 
NO CHARGE FOR REDEMPTION   The Trustee, United States Trust Company of New York,
will redeem units at net asset value. In addition, John Nuveen & Co.
Incorporated intends to maintain a secondary market for this Nuveen Tax-Exempt
Unit Trust. Inasmuch as all securities investments are subject to market price
fluctuation, net asset value at the time of redemption could be more or less
than the initial investment.
 
- -------------------------------------------------------
 
REINVESTMENT OPTIONS   Specify automatic reinvestment of trust income, with no
sales charge, to earn compounded dividends with Nuveen mutual funds.
 
- -------------------------------------------------------
 
UNITS OF THE TRUST ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY BANK AND ARE NOT FEDERALLY INSURED OR OTHERWISE PROTECTED BY THE FEDERAL
DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER AGENCY AND
INVOLVE INVESTMENT RISK, INCLUDING THE POSSIBLE LOSS OF PRINCIPAL.
 
- -------------------------------------------------------
 
* Insurance relates specifically to the bonds and not to the units or to the
  market value of units. Terms of the insurance are more fully described in the
  prospectus. No representation is made as to the insurer's ability to meet its
  commitments. See Section 5 of the prospectus for details.
 
- -------------------------------------------------------
 
FOR A PROSPECTUS CONTAINING MORE COMPLETE INFORMATION, INCLUDING CHARGES AND
EXPENSES, ON THIS NUVEEN TAX-EXEMPT UNIT TRUST AND ANY OTHER NUVEEN FUND, CALL
YOUR BROKER . . . OR NUVEEN AT
 
                                 1-800-257-8787
 
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.
<PAGE>
NUVEEN  Tax-Exempt Unit Trusts
     NUVEEN
     FLORIDA
     INSURED
     TRUST 210
 
            Estimated Current Return
            5.29% to 5.50%
            as of 04/24/95
 
            Estimated Long Term Return
            5.38% to 5.60%
             40,000 units in a
             diversified $4,000,000
             portfolio of tax-exempt
             bonds rated "AAA"
                  Cusip:
                  6706H4 109 Monthly Payment Option
                  6706H4 117 Quarterly Payment Option
                  6706H4 125 Semi-Annual Payment Option
 
                  Registered in Florida
                    John Nuveen & Co. Incorporated
                    Investment Bankers
 
<TABLE>
<S>                           <C>
Chicago:                      Atlanta
333 W. Wacker Dr.             Austin
Chicago, Illinois 60606       Boca Raton
Telephone: 312.917.7700       Boston
                              Columbus
New York:                     Dallas/Ft. Worth
Swiss Bank Tower              Irvine
10 East 50th Street           Philadelphia
New York, New York 10022      Phoenix
Telephone: 212.207.2000       San Francisco
                              Seattle
                              Tampa
                              Washington, D.C.
</TABLE>
 
<PAGE>
- --------------------------------------------------------------------------------
 
NUVEEN TAX-EXEMPT UNIT TRUST--INSURED, FLORIDA INSURED TRUST 210
SCHEDULE OF INVESTMENTS
DATE OF DEPOSIT APRIL 25, 1995
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<TABLE>
<CAPTION>
                                                                                                             Ratings
                                                                                    Optional         -----------------------
  Aggregate            Name of Issuer and Title of Issue Represented               Redemption        Standard
  Principal               by Sponsor's Contracts to Purchase Bonds                 Provisions        & Poor's       Moody's
  <C>       <C> <S>                                                              <C>                 <C>           <C>
  --------------------------------------------------------------------------------------------------------------------------
  $  500,000    Florida Municipal Power Agency, Stanton II Project Refunding       2003 at 100          AAA           Aaa
                  Revenue Bonds, Series 1993, 4.50% Due 10/1/27. (Original
                  issue discount bonds delivered on or about October 5, 1993
                  at a price of 88.625% of principal amount.)
     500,000    State of Florida, Full Faith and Credit, Department of             2005 at 101          AAA           Aaa
                  Transportation, Right-of-Way Acquisition and Bridge
                  Construction Bonds, Series 1995, 5.875% Due 7/1/24.
                  (General Obligation Bonds.) (When issued.)
     500,000    Dade County, Florida, Aviation Revenue Bonds, Series 1995C,        2005 at 102          AAA           Aaa
                  5.75% Due 10/1/25.
     500,000    City of Miramar, Florida, Water Improvement Assessment             2003 at 102          AAA           Aaa
                  Bonds, Series 1993, 5.60% Due 10/1/24.
     500,000    Pinellas County (Florida), Health Facilities Authority,            2003 at 102          AAA           Aaa
                  Hospital Revenue Bonds, Series 1993 (Morton Plant Health
                  System Project), 5.625% Due 11/15/23.
     500,000    City of Tampa, Florida, Allegany Health System Revenue             2003 at 102          AAA           Aaa
                  Bonds, St. Joseph's Hospital, Inc. Issue, Series 1993,
                  5.125% Due 12/1/23. (Original issue discount bonds
                  delivered on or about January 4, 1994 at a price of
                  94.522% of principal amount.)
     500,000    West Coast Regional Water Supply Authority (Florida),              2005 at 101          AAA           Aaa
                  Refunding Revenue Bonds (Hillsborough County Project),
                  Series 1995, 5.75% Due 10/1/19. (When issued.)
     500,000    Commonwealth of Puerto Rico, Public Improvement Refunding          2003 at 100          AAA           Aaa
                  Bonds, Series 1993 (General Obligation Bonds.), 5.00% Due
                  7/1/21. (Original issue discount bonds delivered on or
                  about July 15, 1993 at a price of 90.01% of principal
                  amount.)
  ----------
  $4,000,000
  ----------
  ----------
</TABLE>
    
 
<PAGE>
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UNIT PRICE, ESTIMATED CURRENT RETURN AND ESTIMATED LONG TERM RETURN DEPEND ON
AMOUNT PURCHASED AND PAYMENT OPTION    The sales charges/volume discounts below
apply on all concurrent purchases of any Nuveen trust units, unless any such
purchases are made by a class of investors for which a separate sales charge is
applicable as described more fully in the Prospectus. Estimated Current Return
equals net income divided by offering price. Estimated Long Term Return
represents an average of the yields to maturity (or call) of the Bonds in the
Trust adjusted to reflect expenses and sales charges.
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                          Estimated Current Return (2)
                                                              -----------------------------------------------------
          AMOUNT PURCHASED                         Public
- -------------------------------------  Sales      Offering          Monthly         Quarterly       Semi-Annual
     Units              Dollars        Charge     Price (1)         Payment          Payment          Payment
- ----------------  -------------------  ------    -----------     -------------    -------------    -------------
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
50-499                 $5,000-$49,999   4.90 %   $     98.08          5.29%            5.32%            5.34%
500-999                 50,000-99,999   4.75           97.92          5.30             5.33             5.35
1,000-2,499           100,000-249,999   4.50           97.66          5.31             5.34             5.36
2,500-4,999           250,000-499,999   4.25           97.41          5.32             5.36             5.38
5,000-9,999           500,000-999,999   3.50           96.65          5.37             5.40             5.42
10,000-24,999     1,000,000- 2,499,999  3.00           96.15          5.39             5.43             5.45
25,000-49,999     2,500,000- 4,999,999  2.50           95.66          5.42             5.45             5.47
50,000 and over    5,000,000 and over   2.00           95.17          5.45             5.48             5.50
</TABLE>
 
- --------------------------------------------------------------------------------
 
<TABLE>
<CAPTION>
                                                                         Estimated Long Term Return (3)
                                                              -----------------------------------------------------
          AMOUNT PURCHASED                         Public
- -------------------------------------  Sales      Offering          Monthly         Quarterly       Semi-Annual
     Units              Dollars        Charge     Price (1)         Payment          Payment          Payment
- ----------------  -------------------  ------    -----------     -------------    -------------    -------------
<S>               <C>                  <C>       <C>         <C>                <C>              <C>
50-499                 $5,000-$49,999   4.90 %   $     98.08          5.38%            5.41%            5.43%
500-999                 50,000-99,999   4.75           97.92          5.39             5.42             5.44
1,000-2,499           100,000-249,999   4.50           97.66          5.41             5.43             5.45
2,500-4,999           250,000-499,999   4.25           97.41          5.42             5.45             5.46
5,000-9,999           500,000-999,999   3.50           96.65          5.46             5.49             5.51
10,000-24,999     1,000,000- 2,499,999  3.00           96.15          5.49             5.52             5.54
25,000-49,999     2,500,000- 4,999,999  2.50           95.66          5.52             5.55             5.57
50,000 and over    5,000,000 and over   2.00           95.17          5.55             5.58             5.60
</TABLE>
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
(1) As of the business day prior to the Date of Deposit. Units are offered at
    the Public Offering Price plus accrued interest.
(2) All figures as of the business day prior to Date of Deposit. The estimated
    current return for purchases made on such date will be as shown, as long as
    the portfolio size and composition remain the same.
(3) In contrast to Estimated Current Return, Estimated Long Term Return reflects
    the amortization of premium or accretion of discount, if any, on the bonds
    in the Trust's portfolio.
 
- --------------------------------------------------------------------------------
 
INTEREST DISTRIBUTIONS TO UNITHOLDERS   Unitholders may elect to have interest
distributions made on a monthly, quarterly, or semi-annual basis. Record Dates
are May 1 and November 1 for semi-annual distributions; February 1, May 1,
August 1 and November 1 for quarterly distributions; and the first of each month
for monthly distributions. Details of interest distributions per unit under the
various plans appear in the following table based upon estimated net annual
interest income at the Date of Deposit:
- --------------------------------------------------------------------------------
 
   
<TABLE>
<CAPTION>
                                                                                                                       Normal
                                                                                                                   Distributions
Florida Insured Trust                                    1995                                  1996                  per Year +
<S>                                     <C>            <C>            <C>            <C>            <C>            <C>
- -------------------------------------------------------------------------------------------------------------      --------------
Record Date*..........................        6/1            8/1           11/1            2/1            5/1
Distribution Date.....................       6/15           8/15          11/15           2/15           5/15
- ---------------------------------------------------------------------------------------------------------------------------------
Monthly Distribution Plan.............  $   .5184(1)                                                               $  5.1853
                                                             --------    $.4320 every month    --------
Quarterly Distribution Plan...........  $   .5184(1)   $   .8694(2)   $  1.3041      $  1.3041      $  1.3041      $  5.2173
Semi-Annual Distribution Plan.........  $   .5184(1)                  $  2.1810(3)                  $  2.6172      $  5.2363
- ---------------------------------------------------------------------------------------------------------------------------------
<FN>
  * Record Dates for semi-annual distributions are May 1 and November 1; for quarterly distributions, they are February 1, May 1,
    August 1 and November 1. Record Dates for monthly distributions are the first day of each month.
(1) The first distribution will be paid to all Unitholders, regardless of the distribution plan selected. Such distribution may
    be more or less than a regular monthly distribution.
(2) The second distribution under the quarterly distribution plan represents a 2-month distribution; subsequent quarterly
    distributions will be regular 3-month distributions.
(3) The second distribution under the semi-annual distribution plan represents a 5-month distribution; subsequent semi-annual
    distributions will be regular 6-month distributions.
</TABLE>
    
 
+ Interest for Unitholders of this series began to accrue as of the Date of
Deposit. Units purchased on the Date of Deposit will have $.10 of accrued
interest that will be added to the Public Offering Price on the Settlement Date.
After provision for expenses of the Fund, the daily rate of accrual from the
Date of Deposit to the first Record Date is $.01440 per unit per day.
Consequently, on the first Record Date (06/01/95), accrued interest will total
$0.5184 per unit for the 36-day period. All interest accrued from the Date of
Deposit to the first Record Date, less expenses, will be distributed on the
first Distribution Date to Unitholders of Record as of the first Record Date.
The first payment to all Unitholders of Record on 06/01/95 is $.5184 per unit.
After the first Record Date daily rates of accrual are:
              Monthly - $0.01440              Quarterly - $0.01449
                             Semi-Annual - $0.01454
This daily rate of accrual, and the annual distributions shown above, will
remain the same as long as the portfolio size and composition remain the same.
 
- --------------------------------------------------------------------------------
 
                                                          798
<PAGE>
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AVERAGE PORTFOLIO LIFE   The average maturity of portfolio bonds is 28.7 years.
The first bond is scheduled to mature in October, 2019, with the last bond
maturity being October, 2027.
 
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BONDS INSURED BY MBIA   Each bond in this Nuveen Insured series has been
insured* by the Municipal Bond Investors Assurance Corporation, which guarantees
timely payments of principal and interest. Premium payments have been fully paid
by the Date of Deposit.
 
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CALL PROTECTION   Bonds are first subject to optional redemption by the issuers
in the years and at the prices shown under the Redemption Provisions column in
the Schedule of Investments. Unless otherwise stated, in subsequent years, bonds
are redeemable at declining prices, but not usually below par value. Some issues
or some portions of issues may also be subject to sinking fund redemption or
extraordinary redemption without premium prior to the dates shown.
 
- -------------------------------------------------------
 
NO CHARGE FOR REDEMPTION   The Trustee, United States Trust Company of New York,
will redeem units at net asset value. In addition, John Nuveen & Co.
Incorporated intends to maintain a secondary market for this Nuveen Tax-Exempt
Unit Trust. Inasmuch as all securities investments are subject to market price
fluctuation, net asset value at the time of redemption could be more or less
than the initial investment.
 
- -------------------------------------------------------
 
REINVESTMENT OPTIONS   Specify automatic reinvestment of trust income, with no
sales charge, to earn compounded dividends with Nuveen mutual funds.
 
- -------------------------------------------------------
 
UNITS OF THE TRUST ARE NOT DEPOSITS OR OBLIGATIONS OF, OR GUARANTEED OR ENDORSED
BY, ANY BANK AND ARE NOT FEDERALLY INSURED OR OTHERWISE PROTECTED BY THE FEDERAL
DEPOSIT INSURANCE CORPORATION, THE FEDERAL RESERVE BOARD OR ANY OTHER AGENCY AND
INVOLVE INVESTMENT RISK, INCLUDING THE POSSIBLE LOSS OF PRINCIPAL.
 
- -------------------------------------------------------
 
* Insurance relates specifically to the bonds and not to the units or to the
  market value of units. Terms of the insurance are more fully described in the
  prospectus. No representation is made as to the insurer's ability to meet its
  commitments. See Section 5 of the prospectus for details.
 
- -------------------------------------------------------
 
FOR A PROSPECTUS CONTAINING MORE COMPLETE INFORMATION, INCLUDING CHARGES AND
EXPENSES, ON THIS NUVEEN TAX-EXEMPT UNIT TRUST AND ANY OTHER NUVEEN FUND, CALL
YOUR BROKER . . . OR NUVEEN AT
 
                                 1-800-257-8787
 
READ THE PROSPECTUS CAREFULLY BEFORE YOU INVEST OR SEND MONEY.


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