Hi,

The attached patch adds support for $…$ latex fragments followed by a
dash, such as $n$-th.

This pattern is quite common, and the issue was mentionned by Rudolf
Adamkovič, here: https://list.orgmode.org/m2mtjvefrf.fsf@me.com/.

This extension of the syntax doesn't conflict with the use of $'s in
table formulas, or for currency, AFAICT.

Regards,

-- 
Sébastien Miquel