Question

помогите
(b²+2b)²-b²(b-1)(b+1)+2b(3-2b²)

Answer 1

(b^2+2b)^2-b^2(b-1)(b+1)+2b(3-2b^2)=b^4+4b^3+4b^2-b^4+b^2+6b-4b^3=5b^2+6b