MathJax MathML3 gives mlongdiv and mstack error - mathjax

Question

I have a problem with MathML equation rendering. Mlongdiv and mstack gives the error Unknownnode type:mstack ..
All other mathml functions work
My sample code is
<script src="MathJax/MathJax.js?config=TeX-AMS-MML_HTMLorMML" ></script>
<script src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
<h1><center>Math Equation Demo</h1></center>
</p>
<p>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<mfrac>
<mn>1</mn>
<mn>2</mn>
</mfrac>
</math>
</p>
<p>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<mfenced>
<mfrac><mrow><mn>123</mn><mo>*</mo><mn>234</mn></mrow><mn>51</mn></mfrac>
</mfenced>
</math>
</p>
<p>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<mstack charalign="center" stackalign="right"><mn>10</mn><msrow><mo>+</mo><mn>15</mn></msrow><msline/><mn>25</mn>
</mstack>
</math>
</p>
<p>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<mlongdiv charalign="center" charspacing="0px" stackalign="left">
<mstack charalign="center" stackalign="right"><mn>2</mn></mstack><mn>50</mn><msgroup><mn>100</mn></msgroup>
</mlongdiv>
</math>
</p>
The output is:

Answer 1

MathJax offers only experimental support for the so-called elementary math section of the MathML spec via its mml3.js extension. For more information see http://docs.mathjax.org/en/latest/mathml.html#supported-mathml-commands, http://docs.mathjax.org/en/latest/options/MML3.html

Answer 2

Put this code in the head section before your other src to mathjax and it adds the functionality for elementary mml3
<!--MathJax MathML 3 experimental support - deals with mstack and mlondiv-->
<script type="text/x-mathjax-config">MathJax.Hub.Config({MathML: {extensions: ["mml3.js"]}});</script>
It's not perfect but as they update the code, you will see the results.