conversations.from: human
conversations.value: Solve the math problem: John bought a tennis racket. He also bought sneakers that cost $200 and a sports outfit that cost $250. He spent a total of $750 for all those items. What was the price of the racket?
conversations.from: assistant
conversations.value: Total amount spent for athletic shoes and sportswear is $200 + $250 = $450.
  The price of the racket is $750 - $450 = $300.