- Type in normal TeX (this is if the checkbox is unchecked), use
$$....$$ to enter mathmode. The former is inline, the latter is block and larger.
- If you do not know TeX, click the checkbox above. Now type math like
1/2+1/(3+4^3), and it will render it by converting to $\LaTeX$. This is an experimental feature. (Some stuff you can try out)
- More info on the script here