m=2+n,2m+3n=14
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(m-n)^3(n-m)^2(m-n)=_____
(3m-n)(m-2n)=()
(m-2n/n-m)-(n/m-n)=
已知3m=2n,则m/(m+n)+n/(m-n)-n^2/(m^2-n^2)=?
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))
2m+3n+2m+3n+m+2m+3n+n=______
(m-2n)(2n+m)-(-3m-4n)(4n-3m)=
m=2+n,2m+3n=14
.4(m+n)^2*(m+n)^3-7(m+n)(m+n)^4+5(m+n)^5=
(m-n)^2*(m-n)^4=?
m-{n-2m+[3m-(6m+3n)+5n]}=
(m-n)(m+n)+(m+n)²-3=2m²
(2m+n)(2m-n)+n(2m+n)-8m^2n^3/(2n^3) m=-2分之1,n=2013
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
(m-2n)^2+(3m-n)(2m+2n)-(2m+n)(2m-n) 已知m+n=4 mn=1