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:
There are 24 bicycles and 14 tricycles in the storage area at Danny 's apartment building . Each bicycle has 2 wheels and each tricycle has 3 wheels . How many wheels are there in all ?

Ex Output:
90


Ex Input:
Fred loves trading cards . He bought 2 packs of football cards for $ 2.73 each , a pack of Pokemon cards for $ 4.01 , and a deck of baseball cards for $ 8.95 . How much did Fred spend on cards ?

Ex Output:
18.42


Ex Input:
Isabella ’ s hair is 18 inches long . By the end of the year her hair is 24 inches long . How much hair did she grow ?

Ex Output:

6