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MathJax enables enables rendering of embedded LaTeX or MathML in HTML pages. This plugin adds this functionality to WordPress. The MathJax JavaScript is inject on-demand only to those pages which require it. This ensures that MathJax is not loaded for all pages, which will otherwise slow loading down.
The MathJax JavaScript can be delivered from your own server, or you can use the Cloudflare Content Distribution Network (CDN), which is the preferred mechanism as it offers increased speed and stability over hosting the JavaScript and configuring the library yourself.
You may embed latex using a variety of different syntaxes. The shortcode (https://codex.wordpress.org/Shortcode_API) syntax is preferred. So <code>[latex]E=mc^2[/latex]</code> will work out of the box. This also forces loading of MathJax.
Additionally, you can use native MathJax syntax — <code>$$E=mc^2$$</code> or <code>$E=mc^2$</code>. However, if this is the only syntax used, the plugin must be explicitly told to load MathJax for the current page. This can be achieved by adding a <code>[mathjax]</code> shortcode anywhere in the post. For posts with both <code>[latex]</code>x<code>[/latex]</code> and <code>$$x$$</code> syntaxes this is unnecessary.
You can use wp-latex syntax, <code>$latex E=mc^2$</code>. Parameters can be specified as with wp-latex but will be ignored. This means that MathJax-LaTeX should be a drop-in replacement for wp-latex. Because this conflicts with wp-latex, this behaviour is blocked when wp-latex is present, and must be explicitly enabled in the settings.
You can also specify <code>[nomathjax]</code> — this will block mathjax on the current page, regardless of other tags.
MathJax-LaTeX is developed on <a href="https://github.com/phillord/mathjax-latex" rel="nofollow ugc">GitHub</a>.
<h3>Copyright</h3>
This plugin is copyright Phillip Lord, Newcastle University and is licensed under GPLv2.

MathJax-LaTeX

This plugin enables MathJax (http://www.mathjax.org) functionality for WordPress (http://www.wordpress.org).

Adam Silverstein

A MathML block for the WordPress block editor (Gutenberg). 
Requires PHP 5.4+ and WordPress 5.0+.
Development takes place on the GitHub repository: https://github.com/adamsilverstein/mathml-block.
Screencast: https://cl.ly/c0f6bbfbc3b1
<h3>What is MathML?</h3>
Mathematical Markup Language is a mathematical markup language, an application of XML for describing mathematical notations and capturing both its structure and content. It aims at integrating mathematical formulae into World Wide Web pages and other documents.
The MathML block uses MathJax to render MathML formulas in the editor and on the front end of a website. MathJax (https://www.mathjax.org/) is A JavaScript display engine for mathematics that works in all browsers.
To test a MathML block and enter a formula, for example: <code>\[x = {-b \pm \sqrt{b^2-4ac} \over 2a}\]</code>.
To test using math formulas inline, type an formula into a block of text, select it and hit the ‘M’ icon in the control bar. For example: <code>$ \cos(θ+φ)=\cos(θ)\cos(φ)−\sin(θ)\sin(φ) $</code>. Note: if you are copying and pasting formulas into the rich text editor, switching to HTML/code editor mode is less likely to reformat your pasted formula.
<h3>Technical Notes</h3>
<ul>
<li>Requires PHP 5.6+.</li>
<li>Requires WordPress 5.0+.</li>
<li>Issues and Pull requests welcome on the GitHub repository: https://github.com/adamsilverstein/mathml-block.</li>
</ul>

MathML Block

The best way I have found to write math formulas on the web.
I just need to remember the LaTex syntax I haven't used in 15 years!

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A MathML block for the WordPress block editor (Gutenberg).

MathJax-LaTeX vs MathML Block