Complex sentence: Everyone escapes after using Lockdown's grenade to destroy the remaining KSI Decepticons while Galvatron retreats, and they reunite with the other Autobots, where Optimus sets the Dinobots free.
Split into simpler sentences: Everyone escapes after using Lockdown's grenade to destroy the remaining Decepticons while Galvatron retreats. They reunite with the other Autobots, where Optimus sets the Dinobots free.