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 are 54 scissors in the drawer . Keith placed 22 more scissors in the drawer . How many scissors are now there in all ?
Example Output: 76

Example Input: Katie had 11 songs on her mp3 player . If she deleted 7 old songs from it and then added 24 new songs , how many songs does she have on her mp3 player ?
Example Output: 28

Example Input: 18 children were riding on the bus . At the bus stop , some more children got on the bus . Then there were 25 children altogether on the bus . How many children got on the bus at the bus stop ?
Example Output:
7