instruction:
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.
question:
for halloween frank got 15 pounds of candy . if he gave 8 pounds to nancy what 's the difference between the pounds of frank 's candy before he gave nancy and he gave to ?
answer:
7

question:
at the arcade dave spent 43 tickets on stuffed tiger . then he had 55 left . how many tickets did dave have to start with ?
answer:
98

question:
rob also compared the empire state building and the petronas towers . what is the height difference between the 2 if the empire state building is 443 m tall and the petronas towers is 452 m tall ?
answer:
9