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The KaTeX WordPress plugin integrates the super-fast <a href="https://github.com/Khan/KaTeX" rel="nofollow ugc">KaTeX math typesetting engine</a> with your WordPress website. The plugin allows you to put LaTeX in a <code>[latex]...[/latex]</code> shortcode, and beautiful math appears on your post or page.
The plugin also has an option to use the excellent <a href="http://www.jsdelivr.com" rel="nofollow ugc">jsDelivr CDN</a> to load the KaTeX scripts, further increasing the performance of the plugin.
Equations in <code>[latex display="true"]...[/latex]</code> will be rendered in display mode (rather than inline mode) and centered on its own line.
<a href="https://andrewsun.com/projects/wp-katex/" rel="nofollow ugc">Plugin Website</a>

WP-KaTeX

Integrates the super-fast KaTeX LaTeX equation typesetting engine with WordPress. Create beautiful, yet performant math in your posts and pages.

Terry L.

WP MathJax displays mathematical notation in web browsers, using MathML, LaTeX and ASCIIMath markup on WordPress by using MathJax.js.
WP MathJax is smart enough that loads mathjax.js only when your posts contain mathjax syntax, by detecting the use of shortcode and block. So it will not be loaded on your website everywhere.
If you are not using Guteberg editor and looking for a <a href="https://github.com/terrylinooo/githuber-md" rel="nofollow ugc">Markdown editor</a> supporting MathJax, you can also check out my WordPress plugin called the WP Githuber MD, which provides a variety of features not just MathJax, it is worth to try.
<h3>Copyright</h3>
WP MathJax, Copyright 2020 TerryL.in 
WP MathJax is distributed under the terms of the GNU GPL
This program is free software: you can redistribute it and/or modify 
it under the terms of the GNU General Public License as published by 
the Free Software Foundation, either version 3 of the License, or 
(at your option) any later version.
This program is distributed in the hope that it will be useful, 
but WITHOUT ANY WARRANTY; without even the implied warranty of 
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
GNU General Public License for more details.

WP MathJax

WP MathJax displays mathematical notation in web browsers, using MathML, LaTeX and ASCIIMath markup on WordPress by using MathJax.js.

WP-KaTeX vs WP MathJax