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]: Katie had 11 songs on her mp3 player . If she deleted 7 old songs from it and then added 24 new songs , how many songs does she have on her mp3 player ?
[A]: 28

[Q]: Emily collects 63 cards . Emily 's father gives Emily 7 more . Bruce has 13 apples . How many cards does Emily have ?
[A]: 70

[Q]: The school cafeteria had 12 apples . If they used 8 to make lunch for the students and then bought 19 more , how many apples would they have ?
[A]:
23