Posted by jaime on Thursday, January 24, 2013 at 7:50pm.
(4x^3+5x^2-2x-1) - (3x^2+7x-4) =
4x^3+5x^2-2x-1-3x^2-7x+4 =
4x^3 + 2x^2 - 9x +3
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