Complex sentence: In 1963, Tulane was frustrated by its enabling competition notwithstanding within the Southeastern Conference schools since many of the schools had lower academic expectations for football and they considered withdrawing from the SEC to compete with schools with similar aims.
Split into simpler sentences: In 1963, Tulane was frustrated by its level of competition within the Southeastern Conference schools since many of the schools had lower academic expectations for football players. They considered withdrawing from the SEC to compete with schools with similar aims.