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:
Tim had 50 cents . He paid 45 cents for a candy bar . How much change will he get ?

Ex Output:
5


Ex Input:
Tim had 7 quarters and 9 nickels in his bank . His dad gave him 3 nickels and 5 pennies . How many nickels does Tim have now ?

Ex Output:
12


Ex Input:
Kevin bought 2 watermelons . The first watermelon was 9.91 pounds , and the second watermelon was 4.11 pounds . How many pounds of watermelon did Kevin buy ?

Ex Output:

14.02