若|m+1/3|+(n-1/2)^2=0,求多项式m^2+2m^3n+n^2-2m^2-2m^3n+3n^2的值
若m+n=0,则多项式m^3-m^3n-mn^2+n^3
若2m-n/m+2n=5,求3(2m-n)/m+2n-m+2n/2m-n+3的值
3m(m-n)-2n(m-n)的平方
已知m-2n=3.求[(3m+2n)(3m-2n)-(m+2n)(5m-2n)]÷1/3 m 的值.
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
若m-n=1,3m+2n=-2求代数式3m(m-n)-2n(n-m)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=3,mn=-1,求多项式-2mn+2m+3n-3mn-2n+2m-4n-m-mn的值
若(3m-2n+1)与|5m=2n-n|互为相反数,求m+n的值
已知|2m-n/m+2n|=3,求2(2m-n)/m+2n-2m-n/m+2n-3的值
诺2m-n/m+2n=5,求3(2m-n)/m+2n-m+2n/2m-n+3的值
当m-n/m+n=3时,求代数式(3m+3n/m-n)-(m-n/m+n)^2的值为多少?