m+2n=2,3m+4n=8.m+n=?

已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2= (m-2n)(2n+m)-(-3m-4n)(4n-3m)= (m-n)^3(n-m)^2(m-n)=_____ (m-2n/n-m)-(n/m-n)= (m-n)^2*(m-n)^4=? (3m-n)(m-2n)=() .4（m+n)^2*（m+n)^3-7（m+n)（m+n)^4+5（m+n)^5= 已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=? m/n=5/3,求（m/m+n）+（m/m+n)-（n^2/m^2-n^2) 已知m/n=5、,求（m/（m+n）)+(m/(m-n))-(n^2/(m^3-n^2)) m+2n=2,3m+4n=8.m+n=? 2m+3n+2m+3n+m+2m+3n+n=______ (m-2n)^2+(3m-n)(2m+2n)-(2m+n)(2m-n) 已知m+n=4 mn=1 如果m和n互为相反数,则m+2m+3m+4m+5m+5n+4n+3n+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/4m^-n^-m-2m/n^-4m^= m-[n-3m-(m-n)]=? (m+4)^2+|n+3|=01/2m-n