<commit_before># af_algorithms
some algorithms example &amp; train of thought

test math jax
<script type="text/javascript" src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=default"></script>

$$x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}$$
\\(x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}\\)
<commit_msg>Revert "test math jax"<commit_after># af_algorithms
some algorithms example &amp; train of thought

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