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

Example Input: Nancy found 35 seashells and 25 starfish on the beach . She gave 17 of the seashells to Jason . How many seashells does Nancy now have ?
Example Output: 18

Example Input: Jovana had 5 pounds of shells in her bucket . She added some shells and now has 28 pounds of shells . How many pounds did she add ?
Example Output: 23

Example Input: Ellen had 380 legos , but Ellen lost 57 of them . How many legos does Ellen have now ?
Example Output:
323