A Tiny MCE plugin which makes writing latex equation easy and WYSIWYG（what you see is what you get）. It converts latex code into image which shows real beautiful latex equations on your post.
It adds an “fx” botton on the wordpress TinyMCE editor, on clicks it the codecogs latex equation editor pops up, where you can edit latex, then click the copy button to copy the equation image back in TinyMCE textarea.
You can also use this editor to only input latex code and let plugins like quicklatex, mathjax or Latex for WordPess to convert it to equation image, you’d better change line 90 in editor_plugin.js 
tinyMCE.activeEditor.execCommand(‘mceInsertContent’, false, ”); 
to 
tinyMCE.activeEditor.execCommand(‘mceInsertContent’, false, ‘\[‘+latex+’\]’); 
inorder to only copy LaTex code to TinyMCE textarea when click the copy button.
I just followed the tutorial written by Greg Winiarski(http://ditio.net/2010/08/15/adding-custom-buttons-to-wordpress-tinymce/) and make codecogs Tiny MCE plugin(http://www.codecogs.com/latex/integration/tinymce/install.php) into a wordpress plugin. Thanks the great guys. If you can make the plugin better to use please tell me in http://www.verymath.com/2011/05/10/codecogs-latex-equation-editor/
<h3>Arbitrary section</h3>
You may provide arbitrary sections, in the same format as the ones above. This may be of use for extremely complicated 
plugins where more information needs to be conveyed that doesn’t fit into the categories of “description” or 
“installation.” Arbitrary sections will be shown below the built-in sections outlined above.
<h3>A brief Markdown Example</h3>
Ordered list:
<ol>
<li>Some feature</li>
<li>Another feature</li>
<li>Something else about the plugin</li>
</ol>
Unordered list:
<ul>
<li>something</li>
<li>something else</li>
<li>third thing</li>
</ul>
Here’s a link to <a href="https://wordpress.org/" title="Your favorite software" rel="ugc">WordPress</a> and one to <a href="http://daringfireball.net/projects/markdown/syntax" title="Markdown is what the parser uses to process much of the readme file" rel="nofollow ugc">Markdown’s Syntax Documentation</a>. 
Titles are optional, naturally.
Markdown uses email style notation for blockquotes and I’ve been told:
<blockquote>
Asterisks for emphasis. Double it up for strong.
</blockquote>
<pre><code><?php code(); // goes in backticks ?>
</code></pre>

Codecogs Latex Equation Editor

Adds codecogs WYSIWYG LaTex equation popup editor to wordrpess TinyMCE editor.

Ron Fredericks

Put your plain text <a href="https://www.biophysicslab.com/wp-content/plugins/wpmathpub/phpmathpublisher/doc/help.html" rel="nofollow ugc">mathematical expressions</a> between [pmath size=xx]…[/pmath] shortcode tags. Useful xx-size integer values range from 8 to 24 (default is 12).
Get more information <a href="https://www.biophysicslab.com/wordpress-math-publisher-plugin/" title="wpmathpub discussion page" rel="nofollow ugc">wpmathpub Plugin</a>
<h3>How To</h3>
To toggle to the math mode within your blog’s content, you must use the [pmath size=xx]…[/pmath] markdown tag. The plugin automatically replaces your math text commands into HTML image tags that look sort of like this: 
<img src=”MathFileName.png” style=”vertical-align:-xxpx; display: inline-block ;” alt=”your math text command” title=”your math text command”/>.
Use the shortcode block to enter math equations from the Gutenberg WordPress block editor.
The math commands must be separated by a space character or surrounded by {}.
Examples:
<ul>
<li>[pmath size=12]S(f)(t)=a_{0}+sum{n=1}{+infty}{a_{n} cos(n omega t)+b_{n} sin(n omega t)}[/pmath] </li>
<li>[pmath size=24]delim{lbrace}{matrix{3}{1}{{3x-5y+z=0} {sqrt{2}x-7y+8z=0} {x-8y+9z=0}}}{ }[/pmath] </li>
<li>[pmath]delim{|}{{1/N} sum{n=1}{N}{gamma(u_n)} – 1/{2 pi} int{0}{2 pi}{gamma(t) dt}}{|} le epsilon/3[/pmath]</li>
<li>[pmath size=16]vec{Del}f(x,y) ~ = ~ {partial{f}}/{partial{x}}hat{i} ~ + ~ {partial{f}}/{partial{y}} hat{j}[/pmath]</li>
<li>[pmath size=16]{Del}f(x,y) ~ = ~ {partial{f}}/{partial{x}}i ~ + ~ {partial{f}}/{partial{y}} j[/pmath]</li>
</ul>
Math elements supported:
<ul>
<li>Usual commands</li>
<li>Parenthesis</li>
<li>Math space</li>
<li>Greek letters</li>
<li>Symbols</li>
<li>Arrows</li>
<li>Sets</li>
<li>Roots</li>
<li>Limits</li>
<li>Big operators</li>
<li>Delimiters</li>
<li>Matrix</li>
<li>Constructions</li>
</ul>
<a href="https://www.biophysicslab.com/wp-content/plugins/wpmathpub/phpmathpublisher/doc/help.html" title="See complete list of elements and the symbols they generate here" rel="nofollow ugc">pmath syntax</a>
<h3>Credits</h3>
<ul>
<li>Thanx to <a href="https://www.xm1math.net/" rel="nofollow ugc">Pascal Brachet</a> for the original PhpMathPublisher library.</li>
</ul>

WP Math Publisher – wpmathpub

This plugin uses shortcode tags to display mathematical equations within your WordPress posts, pages, and comments.

Codecogs Latex Equation Editor vs WP Math Publisher – wpmathpub