[(a²+b²)/(a²-b²)-(a-b)/(a+b)]÷2ab/[(a-b)(a+b)³]

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[(a²+b²)/(a²-b²)-(a-b)/(a+b)]÷2ab/[(a-b)(a+b)³][(a²+b²)/(a²-

[(a²+b²)/(a²-b²)-(a-b)/(a+b)]÷2ab/[(a-b)(a+b)³]
[(a²+b²)/(a²-b²)-(a-b)/(a+b)]÷2ab/[(a-b)(a+b)³]

[(a²+b²)/(a²-b²)-(a-b)/(a+b)]÷2ab/[(a-b)(a+b)³]
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