若3(m+n)-2=2(m+n)2m+2n=过程

(m-n)^3(n-m)^2(m-n)=_____ (3m-n)(m-2n)=() (m-2n/n-m)-(n/m-n)= 已知3m=4n,则m/m+n+n/m-n-m^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)) (1),(-m-n)(-m+n) (2),(-m+n)(m-n) 已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=? (m-2n)(-m-n) 若2m-n/m+2n=5,求3（2m-n）/m+2n-m+2n/2m-n+3的值 若2m-n/m+2n=5,求3（2m-n）/m+2n-m+2n/2m-n+3的值 2m+3n+2m+3n+m+2m+3n+n=______ (m-2n)(2n+m)-(-3m-4n)(4n-3m)= 若2m=3n,求分式（1+m/n-n/n-m)除以（1-m/n-n/n+m)的值 若2m=3n,求分式（1+m/n-n/n-m)除以（1-m/n-n/n+m)的值 若（m+n)(m-n)^2-mn(m+n)=(m+n)·M,则M是 [(m-n)^2*(m-n)^3]^2/(m-n)^4 [(m-n)^2*(m-n)^3]^2/(m-n)^4