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.

Example Input: Marie starts with 95 erasers . She loses 42 . How many erasers does Marie end with ?
Example Output: 53

Example Input: There are 4 walnut trees currently in the park . Park workers will plant 6 more walnut trees today . How many walnut trees will the park have when the workers are finished ?
Example Output: 10

Example Input: Albert has 9 bottle caps . Anne has with 10 bottle caps . Anne finds another 5 . How many bottle caps does Anne end with ?
Example Output:
15