I have to find all entries in a file which match the following:
(pg. 2) (pg. 210) (pg. 211) (pg. 309) (pg. 4000)
etc etc
what regex pattern would I use?
As Iain mentioned, it depends entirely on what program you're using, as they all interpret regex slightly differently.
That said, if it is in perl, I'd use this:
\(pg\. \d+\)
