conversations.from: human
conversations.value: Alberto spent $2457 on a new engine for his car. Samara spent $25 on oil, $467 on tires and $79 on detailing for her car. How many more dollars did Alberto spend on his car?
  Solve it.
conversations.from: assistant
conversations.value: Samara = 25 + 467 + 79 = $571
  2457 - 571 = $1886
  Alberto spent $1886 more on his car.