Question

(2m3n2)(-5m3n+2m2n2-4mn3+n4)

Answer 1

(2m3n2) (-5m3n+2m2n2-4mn3+4n)=
(-10m^6n^3+4m^5n^4-8m^4n^5+8m^3n^2+1)=
-10m6n3+4m5n4-8m4n5+8m3n3

Saludos;