1)а^3+3а^2b+3ab^2+b^3.
2)(a+b)(a^2+2ab+b^2)=a^3+2a^2b+ab^2+a^2b+2ab^2+b^3.
3)a^3+2a^2b+ab^2+a^2b+2ab^2+b^3.
4.a(a^2+2ab+b^2)+b(a^2+2ab+b^2).
