Complex sentence: Since he was busy after the success of Roja, Bombay and many and he was busy composing for Rangeela, Dil se then opted to the regular composer for the songs of the film were written by Upendra and music was composed by Gurukiran.
Split into simpler sentences: Since he was busy after the success of Roja, Bombay and many and he was busy composing for Rangeela, Dil se. The songs of the film were written by Upendra and music was composed by Gurukiran.