Math expression in a note (annotation)

I have a note that calls for ## holes in the part.

The print dimensions the spacing between the first two holes and says (## - 1) spaces.

I looked through the tips for text thread ( http://communities.ptc.com/message/185313#185313 ) but couldn't find anything.

Is there a way to perform this math within the note?

i.e. 14 holes there for 13 spaces (where the 13 is the pattern p## less one).

Thanks, Dale