(a²-7)(a+2)-(2a-1)(a-14) помогите пож..

Question

(a²-7)(a+2)-(2a-1)(a-14) помогите пож..

Answer 1

A³+2a²-7a-14-2a²+28a+a-14=a³+22a-28

Answer 2

(a^2-7)(a+2)-(2a-1)(a-14)=a^3+2a^2-7a-14-2a^2+28a-a+14=a^3+20a