Question

СРОЧНО!!! ДАЮ 35 БАЛЛОВ

Answer 1

$3a+3b-a=2a+3b\\\\12b^2-7a+b^2+a=13b^2-6a\\\\x^2-x+y^2+x=x^2+y^2\\\\4x^2+2x-3-x=4x^2+x-3\\\\x^2-3x+1-x^2+3x-1=0\\\\x^2+3x^3-4x^2+5x^3=8x^3-3x^2$