m^3n-2m^2n^2+mn^3

-3m^2n/5+m^2n-mn^2 (m^2-n^2/mn)^2÷(m+n)^2*(m/m-n)^3 化简 急2[mn+(-3m)]-3(2n-mn),m+n=2 mn=-3 3(m^2n+mn)-4(mn-2m^2n)+mn. 已知mn／m+n=2,求3m-5mn+3n/-m+3mn-n的值 已知mn/m+n=2,求3m-5mn+3n/（-m）+3mn-n 已知M+N分之MN=2,求-m+3mn-n分之3m-5mn+3n 已知mn/m+n=2求3m-5mn+3n/-m+3mn-n 化简:m/(m-n)根号(m^3-2m^2n+mn^2)(m 已知m-n=4,mn=2,求多项式（-2mn+2m+3n)-(3mn+2n-2n)-(m+4n+mn)的值 计算(-mn)^2×(-m^2n)^3 (3m-2n)²+24mn