Given a math word problem, answer the following question. You might need to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the question and then only report the final numerical answer.

Example Input: on tuesday mrs. hilt saw 88 raisins on a tray in the cafeteria . that was 8 more raisins than she saw the day before . how many raisins were on the table on monday ?
Example Output: 80

Example Input: for halloween isabel received 16 pieces of candy from neighbors and 5 pieces from her older sister . if she only ate 3 pieces a day how long would the candy last her ?
Example Output: 7

Example Input: tommy has $ 79 . he wants to buy a $ 35 camera . he also wants to buy a $ 59 cd player . how much more money does tommy need ?
Example Output:
15