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: Sam grew 4 watermelons , but the rabbits ate 3 watermelons . How many watermelons does Sam have left ?
Example Output: 1

Example Input: For Halloween Faye scored 47 pieces of candy . She ate 25 pieces the first night and then her sister gave her 40 more pieces . How many pieces of candy does Faye have now ?
Example Output: 62

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