计算(2m-3n)(4m^2+6mn+9n^2)

计算(2m-3n)(4m^2+6mn+9n^2) 计算(-mn)^2×(-m^2n)^3 若m-n=4,mn=-1求(9-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn) (3m-2n)(9m方+6mn+4n方）-（3m+2n)(9m方-6mn+4n方）计算要过程拜托各位了 3Q 计算(m+4n)(m-n)-6(m+2n)(m-3n) 计算(-2mn)^3(mn+1/2)(m^2n^2-1/2mn+1/4) 3(m^2n+mn)-4(mn-2m^2n)+mn. 已知m-n=4,mn=2,求多项式（-2mn+2m+3n)-(3mn+2n-2n)-(m+4n+mn)的值 已知m-n=4,mn=2,求多项式（-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值. 已知m-n=2,mn=1,求多项式(2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值 已知｜m-n-2｜与（mn-1)^互为相反数,求（-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值 已知m-n=3,mn=-3,求(-m-4n-mn)-(2mn-2m-3n)-(3mn+2n-2m)的值