Complex sentence: Prussia tried to take opportunity of the Russian Empire wars with Ottomans and Sweden and move the weak Commonwealth into its sphere of influence and some factions in the Commonwealth deemed this as an opportunity to shake free from decades of Russian control.
Split into simpler sentences: Prussia tried to take opportunity of the Russian Empire's wars with the Ottoman Empire and Sweden and move the weak Commonwealth into its sphere of influence. Some factions in the Commonwealth deemed this as an opportunity to shake free from decades of Russian control.