1) (1-m)(m^2+4m)=m^2+4m-m^3-4m^2=-3m^2+4m-m^3
2) (a-4b)(a^2-3ab+2b^2) = a^3-3a^2b+2ab^2-4a^2b+12ab^2-8b^3=a^3-7a^2b+14ab^2-8b^3
1) (1-m)(m^2+4m)=m^2+4m-m^3-4m^2=-3m^2+4m-m^3
2) (a-4b)(a^2-3ab+2b^2) = a^3-3a^2b+2ab^2-4a^2b+12ab^2-8b^3=a^3-7a^2b+14ab^2-8b^3