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: A waiter had 6 tables he was waiting on , with 3 women and 5 men at each table . How many customers total did the waiter have ?
Example Output: 48

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: Jessica grew 35 watermelons and 30 carrots , but the rabbits ate 27 watermelons . How many watermelons does Jessica have ?
Example Output:
8