Complex sentence: He also created several works for the strings (three quartets and two quintets, and several violin sonatas), works of incidental music and several operas, his most-often recorded and played works are several piano sonatinas, and numerous works for flute.
Split into simpler sentences: He also created several works for the strings (three quartets and two quintets, and several violin sonatas), works of incidental music and several operas. However, his most-often recorded and played works are several piano sonatinas and numerous works for flute.