3m+2n/4=m+5n/-3=2m+n+2/5
已知m/n=5、,求(m/(m+n))+(m/(m-n))-(n^2/(m^3-n^2))
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
已知2m+n分之m-2n=3,则2m+n分之3(m-2n)+3(2m+n)分之m-2n-4(2m+n)分之5(m-2n)
(n-m)^3×(m-n)^2-(m-n)^5
因式分解(n-m)^3(m-n)^2-(m-n)^5
3m+4n-[2m+(5m-2n)-3n]其中m=n分之一=2
[2(m+n)^5-3(m+n)^4+(-m-n)^3]÷[2(m+n)^3]
m-{n-2m+[3m-(6m+3n)+5n]}=
若5m-3n=-4,求出2(m-n)+4(2m-n)
若2m-n/m+2n=5,求3(2m-n)/m+2n-m+2n/2m-n+3的值
诺2m-n/m+2n=5,求3(2m-n)/m+2n-m+2n/2m-n+3的值