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:
On Wednesday , Joan spent 4 half - dollars playing pinball . The next day , she spent 14 half - dollars on pinball . What was the total amount Joan spent playing pinball ?

Ex Output:
9


Ex Input:
Lucy has an aquarium with 212 fish . Lucy wants to buy 68 more fish . How many fish would Lucy have then ?

Ex Output:
280


Ex Input:
Billy has 62 crayons . 52 are eaten by a hippopotamus . How many crayons will Billy have ?

Ex Output:

10