(a-n)^2n-(b-m)^4m
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(a-n)^2n-(b-m)^4m(a-n)^2n-(b-m)^4m(a-n)^2n-(b-m)^4m平方差原式=[(a-n)^n+(b-m)^2m][(a-n)^n-(b-m)^2m]
(a-n)^2n-(b-m)^4m
(a-n)^2n-(b-m)^4m
(a-n)^2n-(b-m)^4m
平方差
原式=[(a-n)^n+(b-m)^2m][(a-n)^n-(b-m)^2m]