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.

[EX Q]: A waiter had 9 tables he was waiting on , with 7 women and 3 men at each table . How many customers total did the waiter have ?
[EX A]: 90

[EX Q]: Iesha has 58 books . 19 are about school and the rest are about sports . How many books about sports does Iesha have ?
[EX A]: 39

[EX Q]: A book store had 4 books in the bargin bin . If they sold 3 books , but then put 10 more in the bin , how many books would be in the bin ?
[EX A]:
11