multiple commands in same sys call

Is it possible to do multiple commands in a 'system' or 'exec' call, like if I were force feeding that function a shell script? I.E. ssh-agent pass phrases blah blah scp filenames, hosts, etc, blah, blah all in one shell so that the ssh-agent gets called by scp? <as a funny aside, I guess my spell checker thinks like I do> <it didn't under stand 'ssh-agent', so it suggested 'shaggiest' and 'shagging'>