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: for a birthday party cody bought 30 regular sodas and 5 diet sodas . How many sodas are there ?
Example solution: 35
Example explanation: total sods = 30+5 = 35

Problem: 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 ?

Solution: 11