己知a^3m=,b^3n=2,求（a^2m)^3+(b^n)^3-a^2m·b^n·a^4m·b^2n的值
问题描述：
己知a^3m=,b^3n=2,求（a^2m)^3+(b^n)^3-a^2m·b^n·a^4m·b^2n的值
答
(a^2m)^3+(b^n)^3-a^2m×b^n×a^4m×b^2n
=a^6m+b^3n-a^6m*b^3n
=(a^3m)^2+b^3n-(a^3m)^2*b^3n
=9+2-9*2
=-7