Complex sentence: In the same year he went to Paris, where he was appointed to the chair of philosophy at Gervais College in 1631, and two years later to the chair of mathematics at the Royal College of France.
Split into simpler sentences: In the same year he went to Paris, and in 1631 he was appointed the philosophy chair at Gervais College. Two years after that, in 1633, he was also made the chair of mathematics at the Royal College of France.