Complex sentence: In 1984, Kamal, Mir, Helal, Naimul and Bappy started a group and after a very short time, Tipu joined as drummer and later was given the role of band leader.
Split into simpler sentences: In 1984, Kamal, Mir, Helal, Naimul and Bappy started a group. Shortly thereafter, Tipu joined as drummer and was later given the role of band leader.