TeX & Mermaid

tex \begin{aligned} \int { \infty}^{\infty} e^{ x^2}\\,dx &= \sqrt{\pi} \\\\ \sum {n=1}^{\infty} \frac{1}{n^2} &= \frac{\pi^2}{6} \end{aligned} mermaid sequencediagram autonumber participant c as client participant a as api participant k as cache participant d as db c >>+a get /item a >>+k lookup alt cache hit k >>a value else miss k >>a empty a >>+d select d >> a row end a >> c 200