instruction:
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.
question:
John weighs 81 pounds . Roy weighs 4 pounds . How much heavier is John than Roy ?
answer:
77


question:
There are 2 bananas in a pile on the desk . Each banana comes in a package of 13 . 7 bananas are added to the pile . How many bananas are there in the pile ?
answer:
9


question:
Sam has 110 books . Joan has 102 books . How many books do they have together ?
answer:

212