conversations.from: human
conversations.value: I would love to understand how to solve this problem: Travis had 61 apps on his tablet. He deleted 9 apps he didn't use anymore and downloaded 18 more. How many apps are on his tablet now?
  Can you explain?
conversations.from: assistant
conversations.value: Travis had 61 - 9 = 52 apps after deleting the ones he didn't use.
  After downloading some more he now has 52 + 18 = 70 apps on his tablet.