Complex sentence: The album "Back For Good" is a collection of their previous hits which consists of 18 tracks, including four new songs, 13 previous hits in a redone format and 1 medley.
Split into simpler sentences: The album "Back For Good" is a collection of their previous hits. It consists of 18 tracks, including four new songs, 13 previous hits in a redone format and 1 medley.