conversations.from: human
conversations.value: Please show me the solution for: The bus started its route. At its first stop, 7 people got on. At the second stop, 3 people got off, and 5 people got on. At the third stop, 2 people got off, and 4 people got on. How many passengers are now on the bus?
conversations.from: assistant
conversations.value: There are 7 people on the bus after the first stop.
  There are 7+5-3=9 people on the bus after the second stop.
  There are 9+4-2=11 people on the bus after the third stop.
  11 passengers are now on the bus.