Personally I'm not even sure what you really mean with "how I can mention the rest of the syntax in it". But maybe that's just me. All in all this is a frequently asked question and IIUC, it is in fact in perlfaq: see e.g.

perldoc -q 'output.*system'
[download]

Also, you may be interested in

• "backticks", aka qx// (see perlop);
• open, and possibly IPC::Open2, IPC::Open3.