Question

(6x-x²)²-x²(x-3)(x+1)+6x(3+2x²)
спасибо заранее)

Answer 1

(6x-x²)²-x²(x-3)(x+1)+6x(3+2x²)=36x^2-12x^3+x^4-x^2(x^2-3x+x-3)+18x+12x^3=
36x^2+x^4-x^4+2x^3+3x^2+18x+12x^3=14x^3+39x^2+18x