-3m^2n/5+m^2n-mn^2
-3m^2n/5+m^2n-mn^2
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
若m-n=4,mn=-1,求(-2mn+m+n)-(3mn+5n-5m)-(m+4n-3mn)的值
3(m^2-mn+2n^2)-2(mn-m^2+n^2)+(5mn-4n^2+1)
已知m-n=7,mn=2 求5n-3mn+5m+2
(a^m)^n*(-a^3m)2n/(a^mn)^5-a^2mn
已知m0,化简|5+3m|-|mn-6n|-|5mn-1|-|2m-3n|
已知MN^2=-6,求-MN(M^2N^5-MN^3-N)的值
(m^2-n^2/mn)^2÷(m+n)^2*(m/m-n)^3 化简