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.

Example Input: Mika had 20 stickers . She bought 26 stickers from a store in the mall and got 20 stickers for her birthday . Then Mika gave 6 of the stickers to her sister and used 58 to decorate a greeting card . How many stickers does Mika have left ?
Example Output: 2

Example Input: On Friday , Sam spent 2 pennies on ice cream . The next day , Sam spent 12 dimes on baseball cards . All in all , how much money did Sam spend ?
Example Output: 1.22

Example Input: Olivia and her mom were picking carrots from their garden . Olivia picked 20 and her mother picked 14 . If only 19 of the carrots were good , how many bad carrots did they have ?
Example Output:
15