JSFiddle - React, Tailwind, and code Playground

HTML

<iframe>

</iframe>

JavaScript

$(function () {
   var iframe = $('iframe')[0],
        iframeDoc = iframe.contentDocument || iframe.contentWindow.document;
        iframeDoc.open();
    iframeDoc.write('<html><head></head><body><span class="xref broken fcla-xml-2.30li18.html#d1e33__notation.MC">MC <span class="ph d4p_eqn_inline">                      <math xmlns="http://www.w3.org/1998/Math/MathML"><msub><mrow><mfenced separators="" open="[" close="]"><mrow><mi>A</mi></mrow></mfenced></mrow><mrow><mi>i</mi><mi>j</mi></mrow></msub></math></span>&nbsp;&nbsp;Matrix Components</span></body></html>');
        iframeDoc.close();
    
    iframeDoc.designMode = "on";
    
    var script = document.createElement('script');
    script.src = 'http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML';
    if ( iframe.contentWindow.window.document.head !== null ) {
      iframe.contentWindow.window.document.head.appendChild(script);
    }
});