О) (4/5 + 1/6) · (23/2 - 15/5 - 9/5) · 45/58

(4/5 + 1/6) · (23/2 - 15/5 - 9/5) · 45/58 = (24/30 + 5/30) · (23/2 - 24/5) · 45/58 = result not simplified due to long computation