Complex sentence: Blow studied computer science and creative writing at the University of California, Berkeley and was president of the Computer Science Undergraduate Association for a semester; he left the university in 1993, a semester before he would have graduated.
Split into simpler sentences: Blow studied computer science and creative writing at the University of California, Berkeley and was president of the Computer Science Undergraduate Association for a semester. He left the university in 1993, a semester before he would have graduated.