Complex sentence: On July 9, he made his television debut on "Late Night with Jimmy Fallon" and performed "Bad Religion", which received rave reviews and had Ocean backed by the show's house band The Roots and a strings section.
Split into simpler sentences: On July 9, Ocean made his television debut and performed "Bad Religion" on "Late Night with Jimmy Fallon". His performance received rave reviews and featured Ocean backed by the show's house band The Roots and a strings section.