Complex sentence: Nevertheless, like the Samanids and Ghaznavids, the Ghurids were great patrons of New Persian literature, poetry and culture and promoted these in their courts as their own and their ancestors left goods to them on a very high level to escaping from arabization and arabism.
Split into simpler sentences: Nevertheless, like the Samanids and Ghaznavids, the Ghurids were great patrons of the New Persian literature, poetry, and culture and promoted these in their courts as their own. Furthermore, their ancestors left goods to them on a very high level to escaping from arabization and arabism.