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:
Sara had 21 quarters in her bank . Her dad gave her 49 quarters . How many quarters does she have now ?

Ex Output:
70


Ex Input:
Daniel had some noodles . He gave 12 noodles to William . Now Daniel only has 54 noodles . How many noodles did Daniel have to begin with ?

Ex Output:
66


Ex Input:
Isha ’ s pencil is 31 inches long . If she sharpens it , now her pencil is 14 inches long . How much did she sharpen off of her pencil ?

Ex Output:

17