You are given a math word problem and you are supposed to only use subtraction on the numbers embedded in the text to answer the following question and then only report the final numerical answer.
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Question: Context: Paco had 40 cookies. He ate 5 cookies and gave 13 of them to his friend. 

 Question: How many cookies did paco have left?

Answer: 22


Question: Context: Mary is baking a cake. The recipe calls for 12 cups of flour 5 cups of sugar and 49 cups of salt. She already put in 11 cups of flour. 

 Question: How many more cups of flour does she need to add?

Answer: 1


Question: Context: Paul got a box of 253 crayons for his birthday. By the end of the school year he had either lost or given away 70 of them. 

 Question: How many crayons did he have left by the end of the school year?

Answer:
183