若|m-3|+n^2-4n+4=0求[(2m+n)^2-3(m+n)(m-n)-4n^2]/(-1/4m)的值
[(m-n)^2*(m-n)^3]^2/(m-n)^4
(m-n)2(n-m)3(n-m)4化简
若m-n=3,3m+2n=2,求代数式6m(m-n)-4n(n-m)的值
已知M=1/3,N=1/27,求(M-N/根号M-根号N)+(M+4N-4根号MN/根号M-2N)的值.
如果m-3n+4=0 求(m-3n)^2+7m^3-3(2m^3n-m^2n-1)+3(m^3+2m^3n-m^2n+n
如果m,n互为相反数,求m+2m+3m+4m+5m+5n+4n+3n+2n+n=多少
[(m+n)(m-n)-(m-n)²+2n(m-n)]÷4n
不解方程组2m-n=3和4m+3n=1求5n(2m-n)^-2(n-2m)^的值
计算1/(m-n)-1/(m+n)-2n/(m^2+n^2)-4n^3/(m^4+n^4)-8n^7/(m^8+n^8)
若(2m-n)2=3mn,求代数式n/m+4m/n-1的值
(3m-4n)(4n+3m)-(2m-n)(2m+n)
[2(m+n)^5-3(m+n)^4+(-m-n)^3]÷[2(m+n)^3]