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

Example Input: lenny has $ 84 . he spent $ 24 on video games and $ 21 at the grocery store . how much does lenny have left ?
Example Output: 39

Example Input: penny 's class is going to animaland the largest zoo on earth for their science field trip . the zoo has a variety of wild animals in captivity . their first destination was the aviary . the aviary has 3 species of eagles on show that day . they have 20 bald eagles 15 harpy eagles and 30 crowned eagles . how many eagles are on display that day ?
Example Output: 65

Example Input: a waiter had 62 customers in his section . if 17 of them left and the rest of his tables had 9 people at each table how many tables did he have ?
Example Output:
5