https://www.ds-vip.top/test/2018/02/16/Mathjax-with-jekyll/

One of the rewards of switching my website to Jekyll is the ability to support MathJax, which means I can write LaTeX-like equations that get nicely displayed in a web browser, like this one ( \sqrt{\frac{n!}{k!(n-k)!}} ) or this one ( x^2 + y^2 = r^2 ).