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: A restaurant served 4 pies during lunch and 9 during dinner today . The restaurant served 7 pies and 2 pizzas yesterday . How many pies were served in total ?

Answer: 20


Question: At the arcade Dave won 11 tickets . If he spent 5 tickets on a beanie and later won 10 more tickets , how many would he have ?

Answer: 16


Question: Melanie had 30 baseball cards , and 9 were torn . Sara bought 18 of Melanie 's baseball cards . How many baseball cards does Melanie have now ?

Answer:
12