Complex sentence: Returning to the University of Oxford in the autumn of 1883, Grey switched to studying jurisprudence in the belief that it would be an easier option, but by January 1884 he had been expelled; however, he was allowed to return to sit his final examination.
Split into simpler sentences: Returning to the University of Oxford in the autumn of 1883, Grey switched to studying jurisprudence in the belief that it would be an easier option, but by January 1884 he had been expelled. Nonetheless, he was allowed to return to sit his final examination.