Раскрыть скобки : (A+2)(a2-a-3) (Y+3)(y+5)(y-1) (Y+2)(y+3)-y(y-1)

Question

Раскрыть скобки :
(A+2)(a2-a-3)

(Y+3)(y+5)(y-1)

(Y+2)(y+3)-y(y-1)

Answer 1

2Aa-Aa-3A+4a-2a-6=Aa-3a+2a-6
(Yy+5Y+3y+15)(y-1)=Yy^2-Yy+5Yy-5Y+3y^2-3y+15y-15=Yy^2+4Yy-5Y+3y^2+12y-15
Yy+3Y+2y+6-y^2+y=Yy+3Y+3y+6-y^2