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: While on vacation , Megan took 15 pictures at the zoo and 18 at the museum . If she later deleted 31 of the pictures , how many pictures from her vacation did she still have ?

A: 2
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Q: Jorge scored 156 goals playing soccer last season . This season he scored 187 goals . What is the total number of goals Jorge scored ?

A: 343
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Q: Wayne collects 9 blocks . Wayne 's father gives Wayne 6 more . How many blocks does Wayne have ?

A:
15
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