化简 -3(n^2-2m^2n^2)
(m-n)2(n-m)3(n-m)4化简
化简m/(m+n)²+n/m²-n²-2n²/(m+n)(m²-n
(m+n)(m-n)-(1-2n)化简
m-{n-2m+[3m-(6m+3n)-5n]}化简
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
计算(3-m+n)*(3+m-n)-(2-m+n)*(2+m-n)
(3m-4n)(4n+3m)-(2m-n)(2m+n)
分式加减法:化简:2m/m-n-n/n-m+m+2n/n-m
化简:(1)m-n+2n
[(m-n)^2*(m-n)^3]^2/(m-n)^4
计算(m+n)^3-(n+m)(m-n)^2
(n-m)^3×(m-n)^2-(m-n)^5