Question

−10m3(9m2+6)(2m−5)
(−5x+7y)(8x+9)

Answer 1

$-10m^3(9m^2+6)(2m-5)=(-90m^5-60m^3)(2m-5)=-180m^6+ \ +450m^5-120m^4+300m^3; \ \ (-5x+7y)(8x+9)=-5x*8x-5x*9+7y*8x+7y*9=-40x^2- \ -45x+56xy+63y;$