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.

Input: Consider Input: Megan 's class is going on a field trip to the zoo . If each van can hold 5 people and there are 25 students and 5 adults going , how many vans will they need ?

Output: 6


Input: Consider Input: Annie has 6 apples . She gets 6 more from Nathan . Later , Annie buys 10 crayons at the store . How many apples does Annie have in all ?

Output: 12


Input: Consider Input: Adam had 48 books . If he sold 19 of them and used the money he earned to buy 38 new books , how many books would Adam have ?


Output: 67