I want to know the Laurent expansion of $f(z)=\frac{z^2}{1-e^z}$ centered at $z=2k\pi i $ with $k\in \mathbb{Z}$ and $k\neq 0$.
I tried using the expansion of $e^z$ or the geometric series but with no sucess.
2026-03-28 16:17:28.1774714648
How to find Laurent expansion of $f(z)$
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