<PRE><B>Question 72998</B>
&lt;pre&gt;

Simplify? 

       (a+3a^2+2a^3)-(a^4-a^3)

      (a+3a^2+2a^3)-1(a^4-a^3)     distribute -1 to (a^4-a^3)
 
  a + 3a^2 + 2a^3 - a^4 + a^3     Combine like terms (terms with the same exponent

  
  a + 3a^2 + &lt;u&gt;2a^3&lt;/u&gt; - a^4 + &lt;u&gt;a^3&lt;/u&gt; 

  a + 3a^2 + 3a^3 - a^4

  -a^4 + 3a^3 + 3a^2 + a         Arrange the terms in descending order
                                 Highest exponent should be written first in this case

  

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