Complex sentence: In September 2015, CASisDEAD released a limited number of the'Commercial 2' mixtape (4) which comprised 6 tracks: 1.Intro, 2.
Split into simpler sentences: In September 2015, CASisDEAD released a limited number of the'Commercial 2' mixtape (4). The mixtape comprised 6 tracks: 1.Intro, 2.