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: There school 's baseball team had 31 new players and 4 returning players . If the coach put them into groups with 7 players in each group , how many groups would there be ?
Example Output: 5

Example Input: Greg and Sharon own neighboring cornfields . Greg harvested 0.4 acre of corn on Monday and Sharon harvested 0.1 acre . How many more acres did Greg harvest than Sharon ?
Example Output: 0.3

Example Input: Edward was trying to expand his game collection . He bought 41 games from a friend and bought 14 more at a garage sale . If 31 of the games did n't work , how many good games did he end up with ?
Example Output:
24