Question

1)2a^3+9(a+1)(a^2-a+1)
2)x(x+2)(x-2)-(x-3)(x^2+3x+9)
3)3(b-1)^2+(b+2)(b^2-2b+4)-(b+1)^3
4)(a-1)^3-4a(a+1)(a-1)+3(a-1)(a^2+a+1)

Answer 1

.................................

Answer 2

спасибо бооьшое