prompt: 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?
messages.content: 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?
messages.role: user
messages.content: Janessa starts with 4 cards + 13 cards = <<4+13=17>>17 cards.
  She adds 17 cards + 36 cards = <<17+36=53>>53 cards from the eBay purchase.
  Janessa decides to throw away 53 cards - 4 cards = <<53-4=49>>49 cards due to damage.
  After giving Dexter the present we know that Janessa kept 49 cards - 29 cards = <<49-29=20>>20 cards for herself.
  #### 20
messages.role: assistant