Question

On simplification

$\frac{1}{1 + z {}^{a - b } + z {}^{a - c} } \times \frac{1}{1 + z {}^{b - c} + z {}^{b - a} } \times \frac{1}{1 + z {}^{c - a } + z {}^{c - b} }$
would reduces to
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Answer 1

First of all I think your question is incomplete , so post a question that is perfect

And if it's not a incomplete question then I think the answer will be 1

Just think about it