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 Input:
Ned was helping the cafeteria workers pick up lunch trays , but he could only carry 5 trays at a time . If he had to pick up 5 trays from one table and 5 trays from another , how many trips will he make ?

Ex Output:
2


Ex Input:
A dust storm sweeps across the prairie . It covers 64535 acres of the prairie in dust , but leaves 522 acres untouched . How many acres does the prairie cover ?

Ex Output:
65057


Ex Input:
A bee colony produced 0.36 pounds of honey , but bears ate 0.05 pounds of it . How much honey remains ?

Ex Output:

0.31