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.

Ex Input:
Context: Rachel had to complete 5 pages of math homework and yet more pages of reading homework. If she had to complete a total of 7 pages of homework

Question: How many pages of reading homework did she have to complete?

Ex Output:
2

Ex Input:
Context: Paul had 51 books and 106 pens. After selling some books and pens in a garage sale he had 82 books and 14 pens left.

Question: How many pens did he sell in the garage sale?

Ex Output:
92

Ex Input:
Context: A grocery store had a total of 17 bottles of which 9 were bottles of regular soda and the rest were bottles of diet soda. They also had 29 apple.

Question: How many bottles of diet soda did they have?

Ex Output:
8