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: 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: Megan had 49 markers . Robert gave her 39 more markers . How many markers does Megan have altogether ?
Example Output: 88

Example Input: There are 41 pencils in the drawer . Mike placed 30 pencils in the drawer . How many pencils are now there in total ?
Example Output:
71