instruction:
You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.
question:
Karen has 639 crayons . Cindy has 504 crayons . How many more crayons does Karen have than Cindy ?
answer:
135


question:
Jessica had 8 quarters in her bank . Her sister borrowed 3 of her quarters . How many quarters does Jessica have now ?
answer:
5


question:
For a birthday party Jerry bought 41 regular sodas and 22 diet sodas . If his fridge would only hold 9 on each shelf , how many shelves would he fill up ?
answer:

7