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.

Q: Chloe picked 48 carrots from her garden . If she threw out 45 of them and then picked 42 more the next day , how many carrots would she have total ?

A: 45
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Q: While playing at the arcade , Edward won 3 tickets playing ' whack a mole ' and 5 tickets playing ' skee ball ' . If he was trying to buy candy that cost 4 tickets a piece , how many could he buy ?

A: 2
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Q: A waiter at ' The Greasy Spoon ' restaurant had 29 customers to wait on . During the lunch rush he added another 20 customers . If 34 of the customers did n't leave him a tip , how many customers did leave a tip ?

A:
15
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