Complex sentence: At the age of 14, he was sent to the Argayashskaya boarding school after which, in 1930, he joined the University of Kazan, where he graduated from the Faculty of Geology in 1935.
Split into simpler sentences: At the age of 14, he was sent to the Argayashskaya boarding school. In 1930, he joined the University of Kazan, where he graduated from the Faculty of Geology in 1935.