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:
Luke made 9 dollars mowing lawns and 18 dollars weed eating . If he only spent 3 dollar a week , how long would the money last him ?

Ex Output:
9


Ex Input:
Arthur baked 35 muffins . How many more muffins does Arthur have to bake to have 83 muffins ?

Ex Output:
48


Ex Input:
Priya needs 54 cupcakes for a birthday party . She already has 15 chocolate cupcakes and 25 vanilla cupcakes . How many more cupcakes should Priya buy ?

Ex Output:

14