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.

Ex Input:
Dave was helping the cafeteria workers pick up lunch trays , but he could only carry 9 trays at a time . If he had to pick up 17 trays from one table and 55 trays from another , how many trips will he make ?

Ex Output:
8


Ex Input:
Joan has 9 blue balloons , Sally has 5 blue balloons , and Jessica has 2 blue balloons . How many blue balloons do they have in total ?

Ex Output:
16


Ex Input:
Edward had 43 books . If he sold 19 of them and used the money he earned to buy 14 new books , how many books would Edward have ?

Ex Output:

38