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.

Ex Input:
diane wants to buy a package of cookies . the cookies cost 65 cents . diane has 27 cents . how much more money does she need ?

Ex Output:
38

Ex Input:
there are some passengers on a bus . at a bus stop 7 more passengers got on the bus and 9 passengers got off . if there are 26 passengers in the bus in the end how many passengers were there at first ?

Ex Output:
28

Ex Input:
if carl has a total of 89 stamps and kevin has 57 how many more stamps does carl have more than kevin ?

Ex Output:
32