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.

[Q]: when maria got to the fair she had $ 87 . when she left she had $ 16 . what 's the difference between the number of dollars when maria got and left the fair ?
[A]: 71

[Q]: victor had $ 10 . for his allowance he got another $ 8 . how much money does he have total ?
[A]: 18

[Q]: katie had 72 ds games and her friend had 23 games . how many do they have total ?
[A]:
95