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:
Bianca and her mom were picking carrots from their garden . Bianca picked 26 and her mother picked 15 . If only 16 of the carrots were good , how many bad carrots did they have ?

Ex Output:
25


Ex Input:
Emily collects 63 cards . Emily 's father gives Emily 7 more . Bruce has 13 apples . How many cards does Emily have ?

Ex Output:
70


Ex Input:
Kelly 's chemistry textbook weighs 7.125 pounds and her geometry textbook weighs 0.625 pound . How much more does the chemistry textbook weigh than the geometry textbook ?

Ex Output:

6.5