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.
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Question: Joan has 9 blue balloons but lost 2 of them . How many blue balloons does Joan have now ?

Answer: 7

Question: Luke was helping the cafeteria workers pick up lunch trays , but he could only carry 4 trays at a time . If he had to pick up 20 trays from one table and 16 trays from another , how many trips will he make ?

Answer: 9

Question: Mike went to 15 basketball games this year , but missed 41 . He went to 39 games last year . How many basketball games did Mike go to in total ?

Answer:
54