化简:4m-7n-2(m-2n)
(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
(3m-4n)(4n+3m)-(2m-n)(2m+n)
(m+n)(m-n)-(1-2n)化简
【(m+n)(m-n)-(m-n²)+2n(m-n)】÷4n
[(m+n)(m-n)-(m-n)²+2n(m-n)]÷4n
分式加减法:化简:2m/m-n-n/n-m+m+2n/n-m
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)
[(m-n)^2*(m-n)^3]^2/(m-n)^4
因式分解4m^2(m-n)+4n(n-m)
化简-3(m-n)²-(m-n)平方-3(m-n)+4m-n)的平方+2(m-n)-1
m-n^2+m-n^2 化简