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:
Sara has 10 marbles . She loses 7 . How many marbles will Sara have ?
answer:
3


question:
A treasure hunter discovered a buried treasure chest filled with a total of 5155 gems . 45 of the gems were diamonds , and the rest were rubies . How many of the gems were rubies ?
answer:
5110


question:
Scott has 4 tickets . Ernest has with 9 tickets . Ernest finds another 72 . How many tickets does Ernest end with ?
answer:

81