(x-1)(x+2)(x^2+4x-32)= 52x^2

(x-1)(x+2)(x^2+4x-32)= 52x^2
(x^2+4x-32)(x^2+x*2-1x-2)=52x^2
(x^2+4x-32)(x^2+2x-x-2=52x^2
(x^2+4x-32)(x^2+x-2)=52x^2
x^4+5x^3-30x^2-40x+64=52x^2
x^4+5x^3-30x^2-40x=52x^2-64
x^4+5x^3=82x^2-40x=64