MathML

by pw_we1

HTML

<script src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
<math>
  <mfenced open="|" close="|">
    <mfenced><mtable> 
      <mtr><msub> <mi>v</mi><mn>1</mn> </msub> </mtr>
      <mtr><msub> <mi>v</mi><mn>2</mn> </msub> </mtr>
    </mtable></mfenced>
  </mfenced>
  <mo>=</mo>
  <msqrt>
    <mrow>
      <msup> <msub> <mi>v</mi><mn>1</mn> </msub> <mn>2</mn> </msup>
      <mo>+</mo>
      <msup> <msub> <mi>v</mi><mn>2</mn> </msub> <mn>2</mn> </msup>
    </mrow>
  </msqrt>
</math>