(3m^2n^3)/mn)^2
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
计算(-mn)^2×(-m^2n)^3
已知m-n=4,mn=2,求多项式(-2mn+2m+3n)-(3mn+2n-2n)-(m+4n+mn)的值
(3m-2n)²+24mn
已知m-n=3,mn=-3,求(-m-4n-mn)-(2mn-2m-3n)-(3mn+2n-2m)的值
【 】÷【mn】=2m-3n
已知m-n=3,mn=-1,求多项式-2mn+2m+3n-3mn-2n+2m-4n-m-mn的值