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int(ln((x-1)/(x+1)))/(x^2-1)dx is equa...

`int(ln((x-1)/(x+1)))/(x^2-1)dx` ` is` ` equal` to`` (a)`1/2(ln((x-1)/(x+1)))^2+C` (b)`1/2(ln((x+1)/(x-1)))^2+C` (c)`1/4(ln((x-1)/(x+1)))^2+C` (d)`1/4(ln((x+1)/(x-1)))^2+C`

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