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: Carlos has 58 blocks . He gives 21 to Rachel . How many blocks will Carlos have ?
Example Output: 37

Example Input: John had 5 dollars . At the store he spent $ 2 on a new game . If he got another 26 dollars for his allowance , how much money does he have now ?
Example Output: 29

Example Input: A bucket contains 3 gallons of water . If Derek adds 6.8 gallons more , how many gallons will there be in all ?
Example Output:
9.8