**Mastering Olympiad Mathematics**," we use $\LaTeX$ powered by MathJax. So if you wish to use $\LaTeX$ in your user comments, you may use the standard default delimiters as defined by Mathjax. Your code will not render in the comment preview, but once your comment is published, it will display properly.

For example, the code:

$\displaystyle \int_a^b f(x)\,dx$

produces:

$\displaystyle \int_a^b f(x)\,dx$

Here is a link explaining the delimiters:

MathJax Delimiters

There is a wide variety of tutorials online for using $\LaTeX$ to create mathematical expressions. Here is a link to the symbols and commands supported by Mathjax:

MathJax Supported Commands

If you have any questions or feedback, please feel free to comment.

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