1/(a²-b²）（b-c),-1/(a+b)(c-b)²

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1/(a²-b²）（b-c),-1/(a+b)(c-b)²1/(a²-b²）（b-c),-1/(a+b)(c-b)²1/(a²-b

1/(a²-b²）（b-c),-1/(a+b)(c-b)²
1/(a²-b²）（b-c),-1/(a+b)(c-b)²

1/(a²-b²）（b-c),-1/(a+b)(c-b)²
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