Complex sentence: It was released on the same day as a number of other Oldfield releases ("QE2 " and"Platinum" remasters, and a 6 CD boxed set) and days after Oldfield's performance at the 2012 Summer Olympics opening ceremony.
Split into simpler sentences: It was released on the same day as a number of other Oldfield releases; "QE2" and "Platinum" remasters, and a 6 CD boxed set. The release came days after Oldfield's performance at the 2012 Summer Olympics opening ceremony.