You are given a math word problem and you are supposed to apply an addition mathematical operator on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Example Input: Context: Tiffany was collecting cans for recycling. On monday she had 10 bags of cans. She found 3 bags of cans on the next day and 7 bags of cans the day after that. 

 Question: How many bags did she have altogether?
Example Output: 20

Example Input: Context: Winter is almost here and most animals are migrating to warmer countries. There are 3 bird families living near the mountain. 26 new bird families came to live near the mountain from the arctic while 2 bird families flew away further south for winter. 

 Question: How many bird families were left near the mountain?
Example Output: 27

Example Input: Context: Paul had some books. After selling 137 in a garage sale he had 105 left. 

 Question: How many books did he have at the start?
Example Output:
242