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:
For Halloween Emily received 5 pieces of candy from neighbors and 13 pieces from her older sister . If she only ate 9 pieces a day , how long would the candy last her ?
answer:
2


question:
64 children were riding on the bus . At the bus stop , some more children got on the bus . Then there were 78 children altogether on the bus . How many children got on the bus at the bus stop ?
answer:
14


question:
Tom has 9 yellow balloons . Sara has 8 yellow balloons . How many yellow balloons do they have in total ?
answer:

17