You are given a math word problem and you are supposed to apply multiple mathematical operators like addition, subtraction, multiplication, or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Ex Input:
anita needs 26 cartons of berries to make a berry cobbler . she already has 10 cartons of strawberries and 9 cartons of blueberries . how many more cartons of berries should anita buy ?

Ex Output:
7

Ex Input:
in a game you start with 2 lives . if you got 6 extra lives in the first level and 11 more in the second how many lives would you have ?

Ex Output:
19

Ex Input:
at the town carnival billy rode the ferris wheel 7 times and the bumper cars 3 times . if each ride cost 5 tickets how many tickets did he use ?

Ex Output:
50