Using regexp to identify matches

I am trying to identify matches using the command regexp. I am trying to isolate either the first subset of a string (e.g. 4002), or expressions inside the parentheses.

s = '4002-247-8102, (2085) 141-1031, 317-535-4310'
splitStr = regexp(s,'[0-9]-\d';'([0-9])\d','match')