For the purposes of contributing to the course notes, you don't need to know much html. Paragraphs start with <p> and end with </p>. For nonstandard symbols like ö or α, use html entities. If you want to copy something from another web page, right mouse click on the background of the page and select 'view source' to see how the page is coded.

Inline equations can be put between $\$$ signs. For instance $\$$x^2$\$$ results in $x^2$ and $\$$\hbar$\$$ results in $\hbar$.

Equations can be labeled:

$\backslash [$ $\backslash$begin{equation} $\backslash$label{quadratic_equation}
$\backslash$large ax^2 + bx +c
$\backslash$end{equation} $\backslash ]$

This equation can then be refered to in the text as $\backslash$eqref{eq:quadratic_equation}.

To test your page, put the following header at the top of a text file

<script type="text/x-mathjax-config">
MathJax.Hub.Config({
  TeX: { equationNumbers: { autoNumber: "AMS" } }
});
</script>

<script type="text/x-mathjax-config">
  MathJax.Hub.Config({
    extensions: ["tex2jax.js"],
    jax: ["input/TeX","output/HTML-CSS"],
    tex2jax: {inlineMath: [["$","$"],["\\(","\\)"]]}
  });
</script>
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-MML-AM_CHTML"></script>

Beneath this put latex text (without the headers) and open the file with a browser.