Complex sentence: His paintings of 1921-22 are experiments in impersonal, unemotional tonalism, and from the 1930s he turned to a more recognisably figurative style of work generally influenced by Cubism.
Split into simpler sentences: His paintings of 1921-22 are experiments in impersonal, unemotional tonalism. From the 1930s he turned to a more recognisably figurative style of work generally influenced by Cubism.