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.

At the arcade , Tom won 32 tickets playing ' whack a mole ' and 25 tickets playing ' skee ball ' . If he spent 7 of his tickets on a hat , how many tickets does Tom have left ?
50

Luke was putting his spare change into piles . He had 5 piles of quarters and 5 piles of dimes . If each pile had 3 coins in it , how many coins did he have total ?
30

At the town carnival Oliver rode the ferris wheel 7 times and the bumper cars 3 times . If each ride cost 3 tickets , how many tickets did he use ?

30