## How to write LaTeX in this blog

Write a $\LaTeX$ expression in between $\$ signs in the usual way, but write the word latex immediately after the opening $\$ sign. Just for the fun of it, here is an example: $\sum\limits_{i=0}^\infty \frac{1}{i!} = e.$ This works equally well in posts or in comments.

You might also want to use \displaystyle to make the LaTeX output more…readable 🙂