Complex sentence: The Libyan Air Force operated a number of MiG-25, possibly more than 60 were delivered, consisting of MiG-25PD, MiG-25RBK, MiG-25PU and MiG-25RU variants.
Split into simpler sentences: The Libyan Air Force operated a large number of Mikoyan MiG-25s, some sources say more than 60 were delivered. Types were of the MiG-25PD, MiG-25RBK, MiG-25PU and MiG-25RU variants.