Shohidul Islam Apu

CF7 Math Captcha is a lightweight plugin that adds a math captcha field to your Contact Form 7 forms. 
It helps reduce spam without using Google reCAPTCHA. 
Very simple to use: just add <code>[mathcaptcha* captcha-field]</code> to your Contact Form 7 form.

Math Captcha for Contact Form 7


Nice, clean and lightweight solution for adding Math Captcha to Contact Form 7. Works smoothly and keeps spam away without extra hassle. Good job, bro! 👏


Keeps spam away without extra hassle

Adds a simple math captcha field for Contact Form 7 to prevent spam submissions.

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.

Math Captcha for Contact Form 7 vs WP Math Publisher – wpmathpub