(1/(a-b)-1/(a+b)÷b/(a^2-2ab+b^2),化简

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(1/(a-b)-1/(a+b)÷b/(a^2-2ab+b^2),化简
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(1/(a-b)-1/(a+b)÷b/(a^2-2ab+b^2),化简
(1/(a-b)-1/(a+b)÷b/(a^2-2ab+b^2),化简

(1/(a-b)-1/(a+b)÷b/(a^2-2ab+b^2),化简
把题目写清楚先
我没猜错的话应该是这个
[1/(a-b)-1/(a+b)]÷[b/(a^2-2ab+b^2)]
=[2b/(a-b)(a+b)]÷[b/(a-b)^2]
=2(a-b)/(a+b)

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