You are given a math word problem and you are supposed to apply multiple mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

[EX Q]: Luke made 9 dollars mowing lawns and 18 dollars weed eating . If he only spent 3 dollar a week , how long would the money last him ?
[EX A]: 9

[EX Q]: Lana was unboxing some of her old winter clothes . She found 3 boxes of clothing and inside each box there were 3 scarves and 4 mittens . How many pieces of winter clothing did Lana have total ?
[EX A]: 21

[EX Q]: There were 39 girls and 4 boys trying out for the schools basketball team . If only 26 of them got called back , how many students did n't make the cut ?
[EX A]:
17