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.

Example Input: Context: Every day Ryan spends a total of 3 hours on learning english and chinese. If he spends 2 hours on learning english everyday 

 Question: How many hours does he spend on learning chinese?
Example Output: 1

Example Input: Context: Jessica cut some roses from her flower garden to put in her vase. There are now 19 roses in the vase. If there were 3 roses in the vase initially 

 Question: How many roses did she cut?
Example Output: 16

Example Input: 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?
Example Output:
22