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: Joan joined her school 's band . She bought a trumpet for $ 149.16 , a music tool for $ 9.98 , and a song book which was $ 4.14 . Joan found $ 8.65 in her pocket . How much did Joan spend at the music store ?
Example Output: 163.28

Example Input: Vanessa had 16 music files and 48 video files on her flash drive . If she deleted 30 of the files , how many files were still on her flash drive ?
Example Output: 34

Example Input: A store had 40 oranges in a bin . If they threw away 25 of the old ones and put 21 new ones in the bin how many would be in the bin ?
Example Output:
36