I'm trying to derive Saha's equation, and I've come up against this definite integral, which I can't seem to find anywhere and may not even be doable; I'm not sure.(adsbygoogle = window.adsbygoogle || []).push({});

\begin{equation}

\int\limits_0^\infty \frac{x^{2}}{e^{x}+1}dx

\end{equation}

Can anyone help? Thanks!

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# How do I integrate this?

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