This is the second blog article

Hmm, Math doesn’t seem to work out of the box. But you can use this: https://ileumas.com/writing/2022/03/astro-math-katex/

This sentence uses $ delimiters to show math inline: $\sqrt{3x-1}+(1+x)^2$

$\int_a^b y \, \mathrm{d}x$

$$\mathrm{C}(\mathrm{S},\mathrm{t})= \mathrm{N}(\mathrm{d}_1)\mathrm{S} - \mathrm{N}(\mathrm{d}_2) \mathrm{K} \mathrm{e}^{-rt}$$ $$M = \begin{bmatrix} \frac{5}{6} & \frac{1}{6} & 0 \\[0.3em] \frac{5}{6} & 0 & \frac{1}{6} \\[0.3em] 0 & \frac{5}{6} & \frac{1}{6} \end{bmatrix}$$ $$A_{m,n} = \begin{pmatrix} a_{1,1} & a_{1,2} & \cdots & a_{1,n} \\ a_{2,1} & a_{2,2} & \cdots & a_{2,n} \\ \vdots & \vdots & \ddots & \vdots \\ a_{m,1} & a_{m,2} & \cdots & a_{m,n} \end{pmatrix}$$