Complex sentence: After the family's return to Pakistan, Omar and his siblings attended a private school in Peshawar, and were homeschooled for two years, returning to write their exams at the "Ansar Scientific Institute".
Split into simpler sentences: After the family's return to Pakistan, Omar and his siblings attended a private school in Peshawar, and were homeschooled for two years. They returned to write their exams at the "Ansar Scientific Institute".