document.write( "Question 666593: need help on combining like terms
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Algebra.Com's Answer #414566 by best82(13)\"\" \"About 
You can put this solution on YOUR website!
Practice:
\n" ); document.write( "Combine the following.
\n" ); document.write( "x+x
\n" ); document.write( "x^2+x-x-x^3
\n" ); document.write( "4+5
\n" ); document.write( "x^2+xy-2xy+y^2
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