已知：a的2m次方,b的3n次方,求(a的3m次方）的2次方—（b的2n次方）3次方+a的2m次方*b的3n次方的值?

(a^3m)^2-(b^2n)^3+(a^2m)X(b^3n)=a^6m-b^6n+(a^2m)X(b^3n)=(a^2m)^3-(b^3n)^2+(a^2m)X(b^3n)=(a^2m)[(a^2m)^2-(b^3n)]-(b^3n)^2