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: Jessica grew 35 watermelons and 30 carrots , but the rabbits ate 27 watermelons . How many watermelons does Jessica have ?
Example Output: 8

Example Input: Nancy picked 12 carrots from her garden . If she threw out 2 of them and then picked 21 more the next day , how many carrots would she have total ?
Example Output: 31

Example Input: There are 107 walnut trees currently in the park . Park workers will plant 104 walnut trees today . How many walnut trees will the park have when the workers are finished ?
Example Output:
211