You are given a math word problem and you are supposed to apply a single mathematical operator like addition, subtraction, multiplication, or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Example Input: haley had 2 dollars . if she got 13 more dollars in total for doing chores and her birthday what 's the difference between the number of dollars before haley got money and she got from events ?
Example Output: 11

Example Input: chris is inviting 82 friends to a party . he has 1804 cookies and 10 peices of candy . how many cookies will each friend get ?
Example Output: 22

Example Input: there are 5 flowers and 3 bees . what 's the difference of the number of flowers and bees over there ?
Example Output:
2