Complex sentence: In the 1980s Arnold went on to teach at William Paterson College, in addition to working as a session musician and playing with Kenny Burrell, he formed a trio that featured Dave Friedman and Anthony Cox.
Split into simpler sentences: In the 1980s Arnold went on to teach at William Paterson College. He worked as a session musician, played with Kenny Burrell, and formed a trio with Dave Friedman and Anthony Cox.