Question 164435
{{{(9+7x^2+5x^4+7x^3) + (-5x^3+2x^2+5+8x^4) = (5x^4+8x^4)+(7x^3-5x^3)+(7x^2+2x^2)+(9+5)=13x^4+2x^3+9x^2+14}}}