Complex sentence: Mary Jane isn't interested in Jimmy, but is interested in rich Pat. Then the gang trys to help Sunshine Sammy get some clothes and they decide to lure rich Pat into their trap to steal his clean clothes, but Pat beats them all up.
Split into simpler sentences: Mary Jane isn't interested in Jimmy, but is interested in rich Pat. The gang tries to help Sunshine Sammy get some clothes. They lure rich Pat into a trap in order to steal his clean clothes, but Pat beats them all up.