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: Michelle has 2 crayons . Janet has 2 crayons . If Janet gives all of her crayons to Michelle , how many crayons will Michelle have ?
Example Output: 4

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: Megan has 19 seashells . How many more seashells does she need to find to have 25 seashells in her collection ?
Example Output:
6