안녕 August 5, 2026 testing Quote: 난 고야이가 되고 싶어 🩷 $$\sum_{n=1}^{\infty} \frac{1}{n^2} = \frac{\pi^2}{6}$$ $$\sum_{n=1}^{\infty} \frac{1}{n^2} = \frac{\pi^2}{6}$$ If escaping is necessary1: $$\begin{pmatrix} a & b \\ c & d \end{pmatrix}$$ Occurs if the backslashes get mangled by markdown (backslash before non-letter). ↩