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.

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

[EX Q]: Luke had 20 stickers . He bought 12 stickers from a store in the mall and got 20 stickers for his birthday . Then Luke gave 5 of the stickers to his sister and used 8 to decorate a greeting card . How many stickers does Luke have left ?
[EX A]: 39

[EX Q]: Melanie picked 4 plums , Dan picked 9 plums , and Sally picked 3 plums from the plum tree . How many plums were picked in total ?
[EX A]:
16