1/m-1/n=3 2m+3mn-2n/m-2mn-n=?

1/M+1/N=5 (3M+MN+2N) / (M-MN=3N) 已知m-n=2,mn=1,求多项式(-2mn+2mn+3n)-(3mn+2n-2m)-(m+4n+mn)的值 已知m-n=2,mn=1,求多项式(-2mn+2mn+3n)-(3mn+2n-2m)-(m+4n+mn)的值 已 知m-n=4,mn=-1,求：（-2mn+2m+3n)-(3mn+2n-2n)-(m+4n+mn)的值 已知m-n=3,mn=-1,求多项式-2mn+2m+3n-3mn-2n+2m-4n-m-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=4,mn=-1,求（-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn）的值. 若m-n=4,mn=-1,求（-2mn+2m+3n）-（3mn+2n-2m）-（m+4n+mn） 若m-n=4,mn=-1求(9-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn) 已知m-n=4,mn=-1,求（-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值 若m-n=4,mn=-1,求(-2mn+m+n)-(3mn+5n-5m)-(m+4n-3mn)的值 m^2+n^2+1=mn+m+n,求3m-4n (m-2n)^2+(3m-n)(2m+2n)-(2m+n)(2m-n) 已知m+n=4 mn=1 已知m-n=4,mn=1,则（2m+3n-2mn）-（m+4n）-(3mn+2n-2m)=_____ 知m*m-mn=1,4mn-3n*n=-2,则m*m+3mn-3n*n的值是多少要有说明 1/m-1/n=3 2m+3mn-2n/m-2mn-n=? 若1/m-1/n=3,求2m-3mn-2n/m-2mn-n的值 若(1/m)-(1/n)=4,求(2m-3mn-2n)/(m-2mn-n)的值