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If x + y + z =xyz,show that (2x)/(1-x^2)...

If x + y + z =xyz,show that `(2x)/(1-x^2)+(2y)/(1-y^2)+(2z)/(1-z^2)=(2x)/(1-x^2).(2y)/(1-y^2).(2z)/(1-z^2)`

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