HOW TO USE EQUATIONS IN BLOGGER (Blogspot.com)?
USE LATEX EQUATIONS IN A BLOGGER POST
To include LaTeX code in your Blogger post, follow the tutorial:
Enter the following CodeCogs.Com's Java Script at the end of the 'Content' area in the HTML Version of the blogger post you want.
<script src="http://latex.codecogs.com/latexit.php?dynamic&div" type="text/javascript"></script>
Then copy the equation's LaTex Code from Microsoft Word & paste it in the following webpage & get LaTeX markup for that equation at the bottom the webpage:
https://www.codecogs.com/latex/eqneditor.php
For example,
LaTeX code for Quadratic equation (from Microsoft Word) is \frac{-b\pm\sqrt{b^2-4ac}}{2a}
LaTeX markup code for Quadratic equation (from CodeCogs.com) is \[\frac{-b\pm\sqrt{b^2-4ac}}{2a}\]
Copy the LaTeX markup for that equation, and use it in the blogger post
For example, Quadratic equation is given by \[\frac{-b\pm\sqrt{b^2-4ac}}{2a}\]
NOTE: Always ensure the usage of Java Script, LaTeX markup Code in your blog post.
HOW TO USE EQUATIONS IN WORDPRESS (Wordpress.com)?
USE LATEX EQUATIONS IN A WORDPRESS BLOG POST
To include LaTeX code in your Wordpress post, simply use the following format:
$latex your-latex-code-here$
$latex \frac{-b\pm\sqrt{b^2-4ac}}{2a}$
NOTE: These LaTeX Codes can be obtained from Microsoft Word.
