Complex sentence: The northern part of the Carpathian Mountains (highest peak Hoverla, 2061 m or 6762 ft) reaches into Ukraine in the western part of the country, but most of its area is taken up by the steppe-like region just north of the Black Sea.
Split into simpler sentences: The northern part of the Carpathian Mountains reach into Ukraine in the western part of the country. Most of Ukraine's area is taken up by the steppe-like region just north of the Black Sea.