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.

[EX Q]: Dan has 32 green and 38 violet marbles . Mike took 23 of Dan 's green marbles . How many green marbles does Dan now have ?
[EX A]: 9

[EX Q]: Dan has $ 3 . He bought a candy bar for $ 1 . How much money is left ?
[EX A]: 2

[EX Q]: A pet store had 13 siamese cats and 5 house cats . During a sale they sold 10 cats . How many cats do they have left ?
[EX A]:
8