Complex sentence: Studying under Bob Hansen, he had a keen interest in avant-garde classical music and free jazz; he also studied under the Italian modernist Luciano Berio at Mills College (classmates included minimalist composer Steve Reich, and future Dead keyboardist Tom Constanten).
Split into simpler sentences: Studying under Bob Hansen, he had a keen interest in avant-garde classical music and free jazz. He also studied under the Italian modernist Luciano Berio at Mills College (classmates included minimalist composer Steve Reich and future Dead keyboardist Tom Constanten).