已知3m+4n+2=4m+3n,则m >n?

已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2= 已知3m+4n+2=4m+3n,则m >n? 已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=? (m-2n)^2+(3m-n)(2m+2n)-(2m+n)(2m-n) 已知m+n=4 mn=1 已知m²+n²=10,m*n=4,则代数式-m^3n-n^3m= 已知3m=4n,则（m/（m+n））+（n/（m-n）)-（m^/（m^-n^））等于多少 如果m和n互为相反数,则m+2m+3m+4m+5m+5n+4n+3n+2n+n= (m-2n)(2n+m)-(-3m-4n)(4n-3m)= |m-n|=n-m,且|m|=4,|n|=3,则m+n=? 已知m/n=5、,求（m/（m+n）)+(m/(m-n))-(n^2/(m^3-n^2)) 已知m-n=4,m、n互为倒数求(-2mn+2m+3n)-(3mn+2n-2m)-(m+4m+mn)的值 4m(m-n)^2+4n(n-m)^3 [(m-n)^2*(m-n)^3]^2/(m-n)^4 [(m-n)^2*(m-n)^3]^2/(m-n)^4 （m-n)2(n-m)3(n-m)4化简 已知m=5 4/7,n=4 3/7, 求代数式[-7/2(m+n)]^3×(m-n)×[-2(m+n)(m-n)]^2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-2根号n .4（m+n)^2*（m+n)^3-7（m+n)（m+n)^4+5（m+n)^5=