如(x+1)/(x-1)

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如(x+1)/(x-1)如(x+1)/(x-1)如(x+1)/(x-1)(x+1)/(x-1)

如(x+1)/(x-1)
如(x+1)/(x-1)

如(x+1)/(x-1)
(x+1)/(x-1)