Complex sentence: In 1833 he became a teacher at the Brunswick gymnasium, in 1837 extraordinary and in 1842 ordlinary professor of classical languages and literature in the university of Göttingen, where he died.
Split into simpler sentences: In 1833 he became a teacher at the Brunswick gymnasium. In 1837 he was appointed extraordinary, and in 1842 ordinary, professor of classical languages and literature at the University of Göttingen, where he died.