Quizier editor now has the builtin feature for Math Equations but because not everyone needs this feature Quizier doesn't load the rendering script by default.

Quizier uses MathJax library as default rendering engine and you will need to load the library Manually.

How to import MathJax Library?

To import the library you need to go to the Settings > General > Integrations and paste the below code in the "Add code before <\ body > of your site" and click "Enable Body Code".

<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.6/MathJax.js?config=TeX-MML-AM_CHTML"></script>

After adding the library you can start adding Math Equations in your post editor.