converts valid mathematical Lisp expressions to LaTeX snippets
improved from https://emacs.stackexchange.com/a/70360 modified with
help from
https://gist.github.com/bpanthi977/4b8ece0eeff3bc05bb82275a23cbb56d

For detailed help visit github page:
https://github.com/Atreyagaurav/litex-mode