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: Mary ’ s mom is getting ready for Mary ’ s birthday party . She blew up 6 balloons this morning and 5 balloons this afternoon . How many balloons did she blow up in all ?
Example Output: 11

Example Input: Kenneth has 3 marbles . He buys 6 more . Later , Kenneth buys 15 apples at the store . How many marbles does Kenneth have in all ?
Example Output: 9

Example Input: There are 4 squirrels in a tree with 2 nuts . How many more squirrels are there than nuts ?
Example Output:
2