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: David has 8 bananas . He gets 50 more from Christopher . Later , David buys 9 cards at the store . How many bananas does David have in all ?
Example Output: 58

Example Input: Joan found 79 seashells on the beach , she gave Mike 63 of the seashells . How many seashells does she now have ?
Example Output: 16

Example Input: There were 58 geese and 37 ducks in the marsh . How many birds were in the marsh ?
Example Output:
95

