Given a math word problem, answer the following question. You might need to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the question and then only report the final numerical answer.

Example Input: a fast food restaurant had 99 hotdogs . after selling some they had 97 left . how many hotdogs did they sell ?
Example Output: 2

Example Input: their next opponent was the green team . if their final score is 68 points and they led by 29 points what is green team 's final score ?
Example Output: 39

Example Input: at the school halloween party 2 girls and 9 boys dressed as ghosts . how many people total dressed as a ghost ?
Example Output:
11