4 (m^3-3^2)-(m^2-6)(m^2+6)-9 (8-m+m^2)(1-m)

Question

4 (m^3-3^2)-(m^2-6)(m^2+6)-9 (8-m+m^2)(1-m)

Answer 1

4m^3-36-m^4+36-9 (8-m+m^2-8m+m^2-m^3)=4m^3-m^4-72+81m-18m^2+9m^3=13m^3-m^4-72+81m+18m^2