(m^2+3m+3)^2
=(m^2)^2+(3m)^2+3^2+2*m^2*3m+2*3*3m+2*3*m^2
=m^4+9m^2+9+6m^3+18m+6m^2
=m^4+6m^3+15m^2+18m+9