conversations.from: human
conversations.value: Can you give me some step-by-step instructions for this math problem: Janessa has a plan to give her brother Dexter his first collection of baseball cards. She currently has 4 cards in addition to the 13 that her father gave her.  She ordered a collection of 36 cards from eBay. After inspecting the cards she found 4 cards are in bad shape and decides to throw them away. Janessa ended up giving Dexter 29 cards. How many cards did Janessa keep for herself?
conversations.from: assistant
conversations.value: Janessa starts with 4 cards + 13 cards = 17 cards.
  She adds 17 cards + 36 cards = 53 cards from the eBay purchase.
  Janessa decides to throw away 53 cards - 4 cards = 49 cards due to damage.
  After giving Dexter the present we know that Janessa kept 49 cards - 29 cards = 20 cards for herself.