(-2m^2n^-3)^-3/(3m^3n^-1)^-2
[(m-n)^2*(m-n)^3]^2/(m-n)^4
(m-n)2(n-m)3(n-m)4化简
计算(m+n)^3-(n+m)(m-n)^2
(n-m)^3×(m-n)^2-(m-n)^5
因式分解(n-m)^3(m-n)^2-(m-n)^5
3m(m-n)-2n(m-n)的平方
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)
已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=?
设m n为自然数,定义m*n=m+(m+1)+(m+2)+(m+3)+.(m+n)
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
(2m+3n)(2m-3n)-(3m-2n)(3m+2n)
(2m+3n)(3m-2n)-(3m-2n)(3m+2n)