Mathjax tags in html_backend.py

### Question

I'm using html_content with MathJax to display mathematical formulas. However, when converting it to Markdown using the ```HTML_backend```, the ```MathJax``` expressions aren't rendered correctly—some formulas written in LaTeX within ```MathJax``` tags disappear during the conversion.
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In markdown convert use HTML_backend:
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```

Here is convert I need:

Could you please update the mathjax_tags in the ```HTML_backend``` to ensure that LaTeX formulas within ```MathJax``` tags are preserved during Markdown conversion?
Thank you