Complex sentence: After the war, Wojciechowski resumed teaching at the UAM became a member of the Polish Academy of Learning (PAU) in 1945 and of the Polish Academy of Sciences (PAN) in 1952.
Split into simpler sentences: After the war, Wojciechowski resumed teaching at the UAM. He became a member of the Polish Academy of Learning (PAU) in 1945 and of the Polish Academy of Sciences (PAN) in 1952.