使用Katex公式

npm uninstall hexo-renderer-marked --save
npm install hexo-renderer-markdown-it-plus --save

katex

katex:
  js:  https://unpkg.com/katex@0.16.4/dist/katex.min.js # https://unpkg.com/katex@0.15.2/dist/katex.min.js
  css: https://unpkg.com/katex@0.16.4/dist/katex.min.css # https://unpkg.com/katex@0.15.2/dist/katex.min.css
  render: https://unpkg.com/katex@0.16.4/dist/contrib/auto-render.min.js # https://unpkg.com/katex@0.15.2/dist/contrib/auto-render.min.js