Complex sentence: The forward retracting tricycle landing gear had four-wheels fitted on the main leg bogies, the main legs bogies rotated 90 degress and retracted into the rear of the inboard engines.
Split into simpler sentences: The forward retracting tricycle landing gear had four-wheels fitted on the main leg bogies. The main legs bogies rotated 90 degress and retracted into the rear of the inboard engines.