Problem
When I was writing my previous post, I typed three $ in
one single paragraph. Although I’d tried adding \ in front of
$1, part of the words between $ are still parsed by MathJax.
Solution
According to another page in MathJax’s official documentation, this
problem can be solved by surrounding the dollar sign by a span tag
with class tex2jax_ignore2, i.e. <span
class="tex2jax_ignore">$</span>.
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MathJax $\rm \TeX$ and $\rm \LaTeX$ Support— MathJax 2.4 documentation ↩
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The tex2jax Preprocessor—MathJax 2.4 documentation ↩