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: Bianca and her friends were recycling paper for their class . For every 3 pounds they recycled they earned one point . If Bianca recycled 24 pounds and her friends recycled 3 pounds , how many points did they earn ?
Example Output: 9

Example Input: John needs $ 2.5 . He has $ 0.75 . How much more money does he need ?
Example Output: 1.75

Example Input: Mary had 7 nickels in her bank . Her dad gave her 5 nickels . How many nickels does Mary have now ?
Example Output:
12