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.

Input: Consider Input: Joan has 47 green and 48 red marbles . Fred took 24 of Joan 's green marbles . How many green marbles does Joan now have ?

Output: 23

Input: Consider Input: Haley and her friends were recycling paper for their class . For every 3 pounds they recycled they earned one point . If Haley recycled 11 pounds and her friends recycled 16 pounds , how many points did they earn ?

Output: 9

Input: Consider Input: Marta picked 2 pumpkins . The first pumpkin weighed 4 pounds , and the second pumpkin weighed 8.7 pounds . How much did the 2 pumpkins weigh all together ?
Output: 12.7