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:
Paul made 68 dollars mowing lawns and 13 dollars weed eating . If he only spent 9 dollar a week , how long would the money last him ?

Ex Output:
9


Ex Input:
A group of 3 friends went into a restaurant . The chef already had 6 chicken wings cooked but cooked 3 more for the group . If they each got the same amount how many would each person get ?

Ex Output:
3


Ex Input:
Kristi jogged for 0.6 of an hour , swam for 0.5 of an hour , and rode her bicycle for 0.75 of an hour . How long did she exercise ?

Ex Output:

1.85