include.html

<script>
MathJax = {
  tex: {
    inlineMath: {'[+]': [['$', '$']]}
  },
  chtml: {
    font: 'mathjax-pagella'
  },
  loader: {
    paths: {
      font: 'https://cdn.jsdelivr.net/npm/@mathjax',
      'mathjax-euler-extension': '[font]/mathjax-euler-font-extension',
    },
    load: ['input/tex-base', '[tex]/newcommand', '[tex]/action', 'output/chtml','[mathjax-euler-extension]/chtml']
  },
  startup: {
    ready() {
      MathJax.startup.defaultReady();
      MathJax._.output.fonts.generic = {
        chtml_ts: {GenericFont: MathJax._.output.fonts['mathjax-pagella'].chtml_ts.MathJaxPagellaFont}
      }
    }
  }
};
</script>