Question

(x+2)(x+1)²-x(x-5)(x+5)+(x-2)²
(5x-8)[2(x+1)+3(x+2)]-(3x+5)[2(x+3)+x-11]
(x+4)[4(x+1)-2+(x+6)]-(2x-1)[5(x+2)-3(x+3)]

Answer 1

(x+2)(x+1)²-x(x-5)(x+5)+(x-2)²=
(x+2)(x²+2x+1)-x(x²-25)+x²-4x+1=
x³+2x²+x+2x²+4x+2-x³+25x+x²-4x+1=
5x²+26x+3