ridhwanahsann

RMGCaptcha Math Guard adds a GDPR-friendly, math-based CAPTCHA to protect your forms from spam and brute force. No external services, no tracking, and fully WordPress.org compliant.
Features:
<ul>
<li>WordPress login protection (captcha on wp-login.php)</li>
<li>Contact Form 7 integration via [pmcMathcaptcha] / [pmcMathcaptcha*]</li>
<li>WooCommerce login and registration protection</li>
<li>Configurable difficulty and operations (Addition/Subtraction/Multiplication/Random)</li>
<li>Hide captcha for logged-in users</li>
<li>Custom error message support</li>
<li>Optional rate limiting and honeypot</li>
<li>Failed login log + logged user list (admin pages)</li>
<li>Translation-ready</li>
</ul>

RMGCaptcha Math Guard

A lightweight math CAPTCHA for WordPress login, Contact Form 7, and WooCommerce forms.

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).

RMGCaptcha Math Guard vs MathML Block