Complex sentence: In 1999 SMI outbid rival ISC to purchase Las Vegas Motor Speedway, then sold the naming rights of its flagship Charlotte Motor Speedway to Lowe's, a $35 million deal that would last until 2009.
Split into simpler sentences: In 1999 SMI outbid rival International Speedway Corporation (ISC) to purchase Las Vegas Motor Speedway. That same year, SMI sold the naming rights of its flagship Charlotte Motor Speedway to Lowe's, a $35 million deal that would last until 2009.