Complex sentence: Herbie easily defeats the other cars and qualifies for the final match with Murphy, but when Murphy talks Maggie into racing for pink slips, Herbie becomes jealous over Maggie's desire to win Murphy's stock car and intentionally loses the race.
Split into simpler sentences: Herbie easily defeats the other cars and qualifies for the final match with Murphy, who talks Maggie into racing for pink slips. Jealous over Maggie's desire to win Murphy's stock car, Herbie intentionally loses the race.