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.

[Q]: If there are 7 bottle caps in a box and Linda puts 7 more bottle caps inside , how many bottle caps are in the box ?
[A]: 14


[Q]: 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 ?
[A]: 50


[Q]: There are 40 boys and some girls on the playground . There are 117 children altogether . How many girls are on the playground ?
[A]:
77