Support for MathJax (Latex style Math equation) in blogpots markdown files

[inarighas]

Describe the bug
Hugo serve does not render properly equations written using Markdown math commands in some blog posts.

To Reproduce
$$\left(1-\sum^{p'}{i=1}\alpha_i~L^i\right)~X_t = \left(1 + \sum^q{i=1} \theta_iL^i \right)\varepsilon_t$$

Expected behavior

[inarighas]

This answer (https://stackoverflow.com/a/68506928/9360793) worked for me. I needed to add shortcode definition in my custom layouts folder and two lines in my custom head.html.

However, using {{< mathjax/block >}} each time I want to write an equation seems heavy. It does the job perfectly though...

[artis3n]

I think this is already included? See #83
https://hugo-profile.netlify.app/blogs/math/