m+n/4m^-n^-m-2m/n^-4m^=

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m+n/4m^-n^-m-2m/n^-4m^=m+n/4m^-n^-m-2m/n^-4m^=m+n/4m^-n^-m-2m/n^-4m^=(1)(a-0.5)^2(a+0.5)^2=[(a-0.5)(

m+n/4m^-n^-m-2m/n^-4m^=
m+n/4m^-n^-m-2m/n^-4m^=

m+n/4m^-n^-m-2m/n^-4m^=
(1)(a-0.5)^2(a+0.5)^2 =[(a-0.5)(a+0.5)]^2 =(a^2(m^2+n^2)^2-4m^2n^2 =(m^2+n^2)^2-(2m^2n)^2 =(m^2+n

m+n/4m^-n^-m-2m/n^-4m^这里的^是什么意思?