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: John made 6 dollars mowing lawns and 18 dollars weed eating . If he only spent 3 dollar a week , how long would the money last him ?
Example Output: 8

Example Input: A textbook costs a bookstore 44 dollars , and the store sells it for 55 dollars . Find the amount of profit based on the selling price .
Example Output: 11

Example Input: There are 7.75 gallons of water in Becky 's fish tank . If Becky adds 7 gallons more , how many gallons will there be in all ?
Example Output:
14.75