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 were 28 bales of hay in the barn . Tim stacked bales in the barn today . There are now 54 bales of hay in the barn . How many bales did he store in the barn ?

Ex Output:
26

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:
James had 39 stickers . He got some more stickers for his birthday . Then he had 61 stickers . How many stickers did James get for his birthday ?

Ex Output:
22