Complex sentence: There are low-density residential and commercial buildings from Steeles Avenue to Major Mackenzie Drive East and from Mahoney Avenue to Lake Drive East, future high density residential and commercial is beginning to go up in Downtown Markham, as Kennedy forms its eastern boundary.
Split into simpler sentences: There are low-density residential and commercial buildings from Steeles Avenue to Major Mackenzie Drive East and from Mahoney Avenue to Lake Drive East. Future high density residential and commercial development is beginning to go up in Downtown Markham, as Kennedy forms its eastern boundary.