Complex sentence: The prepuce is first cut off, leaving only a small part where the main veins are located, which is pulled down and the small hole through which the glans in pushed through is created.The remining part is left hanging down, but the glans exposed.
Split into simpler sentences: The prepuce is first cut off, leaving only a small part where the main veins are located, which is pulled down and the small hole through which the glans in pushed through is created. The remaining part is left hanging down, but the glans exposed.