Complex sentence: To the east, the line widens to six tracks, with two tracks starting between the local and express tracks in each direction, then ramping down to a lower level, where they widen to four tracks and run under the 75th Avenue station to Jamaica Yard.
Split into simpler sentences: To the east, the line widens to six tracks with two tracks starting between the local and express tracks in each direction. These two tracks ramp down to a lower level, where they widen to four tracks and run under the 75th Avenue station, leading to Jamaica Yard.