◆ Joe AND his friends ARE going to the beach.
◆ Mathematics, history, AND science ARE mandatory high-school subjects.
◆ along with Polly / accompanied by me / in addition to surgery / together with a tie / as well as the mayor / including salt and pepper
◆ Joe, as well as his friends, IS going to the beach.
◆ Mathematics, in addition to history and science, IS a required subject.