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

Example Input: There are 55 oranges in a box . Deborah has 11 oranges in a bag . Susan takes 35 oranges out of the box . How many oranges are left in the box ?
Example Output: 20

Example Input: There are 97 erasers in a box . Ernest has 17 erasers in a bag . Mark takes 97 erasers out of the box . How many erasers are left in the box ?
Example Output: 0

Example Input: Sean has 55 blocks . 29 are eaten by a hippopotamus . How many blocks will Sean have ?
Example Output:
26