Complex sentence: The eldest Bailey brother, Ty'Ree (Pooch Hall), who is twenty one years old, is a mail room manager at a publishing company who got into M.I.T but declined the acceptance to raise his younger brothers.
Split into simpler sentences: The eldest Bailey brother, twenty-one-year-old Ty'ree (Pooch Hall), is a mail room manager at a publishing company. He was accepted into MIT prior to the events of the show, but declined the acceptance to raise his younger brothers.