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: A dust storm sweeps across the prairie . It covers 64535 acres of the prairie in dust , but leaves 522 acres untouched . How many acres does the prairie cover ?
Example Output: 65057

Example Input: Will was working as a sacker at a grocery store where he made 8 dollars an hour . On Monday he worked 8 hours and on Tuesday he worked 2 hours . How much money did Will make in those two days ?
Example Output: 80

Example Input: Melissa has 70 oranges . John takes 19 away . How many oranges will Melissa have ?
Example Output:
51