如何在AMP网站中实现MathJax

<script async custom-element="amp-mathml" src="https://cdn.ampproject.org/v0/amp-mathml-0.2.js"></script>
<script async custom-template="amp-mustache" src="https://cdn.ampproject.org/v0/amp-mustache-0.2.js"></script>
<script async src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=AM_HTMLorMML-full"></script>

<amp-mathml layout="container">
  <script type="text/plain" template="amp-mustache">
    {{mathml}}
  </script>
</amp-mathml>

<script type="text/plain" template="amp-mustache">
  <math xmlns="http://www.w3.org/1998/Math/MathML">
    <mi>x</mi>
    <mo>=</mo>
    <mfrac>
      <mrow>
        <mo>-</mo>
        <mi>b</mi>
        <mo>&pm;</mo>
        <msqrt>
          <msup>
            <mi>b</mi>
            <mn>2</mn>
          </msup>
          <mo>-</mo>
          <mn>4</mn>
          <mo>×</mo>
          <mi>a</mi>
          <mo>×</mo>
          <mi>c</mi>
        </msqrt>
      </mrow>
      <mrow>
        <mn>2</mn>
        <mo>×</mo>
        <mi>a</mi>
      </mrow>
    </mfrac>
  </math>
</script>