Find each of the following products:
(x2−xy+y2)×(x+y)
(x2−xy+y2)×(x+y)=(x2−xy+y2)×x+(x2−xy+y2)×y=x3−x2y+xy2+x2y−xy2+y3=x3+y3
(x2−y2)×(x+2y)
Find each of the following products: (x2−3x+7)×(2x+3)
(x2−a2)×(x−a)
(x2−5x+8)×(x2+2)