Complex sentence: In addition to diplomatic tensions between the Tsar and Khmelnytsky, a number of other disagreements between the two surfaced, notably in regard to Russian officials' interference in the finances of the Hetmanate and in the newly liberated Belarus.
Split into simpler sentences: In addition to diplomatic tensions between the Tsar and Khmelnytsky, a number of other disagreements between the two surfaced. This were notably in regard to Russian officials' interference in the finances of the Hetmanate and in the newly liberated Belarus.