Complex sentence: Included were teasers of the band performing two songs: an unfinished version of "Disposable Teens", and a rough demo cover of the ballad "Little Child" known as "Mommy Dear".
Split into simpler sentences: Included were teasers of the band performing two songs. The first cut was an unfinished version of "Disposable Teens", and the second was a rough demo cover of the ballad "Little Child" known as "Mommy Dear".