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]: Joan found 79 seashells on the beach , she gave Mike 63 of the seashells . How many seashells does she now have ?
[A]: 16


[Q]: A florist had 37 roses . If she sold 16 of them and then later picked 19 more , how many roses would she have ?
[A]: 40


[Q]: On Wednesday , Joan spent 4 half - dollars playing pinball . The next day , she spent 14 half - dollars on pinball . What was the total amount Joan spent playing pinball ?
[A]:
9