Complex sentence: Sonbert had several highly successful shows at the New York Filmmakers' Cinémathèque of these film, as well as screenings at the Jewish Museum and the Elgin Theatre, as well as appearing with his work at the MIT Film Society in Cambridge, Massachusetts.
Split into simpler sentences: Sonbert had several highly successful shows at the New York Filmmakers' Cinémathèque of these films. Sonbert also had screenings at the Jewish Museum and the Elgin Theatre, as well as appearing with his work at the MIT Film Society in Cambridge, Massachusetts.