You are given a math word problem and you are supposed to only use subtraction on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

[Q]: Context: At the arcade Dave had won 19 tickets. If he used 12 to buy some toys and 7 more to buy some clothes 

 Question: How many more tickets did Dave use to buy toys than he did to buy clothes?
[A]: 5


[Q]: Context: For Gwen's birthday she received 2 dollars from her mom. Her dad gave her 4 more dollars. If she spent 3 dollars. 

 Question: How much money did she still have?
[A]: 3


[Q]: Context: There are 11 different books and 17 different movies in the ' crazy silly school ' series. If you read 7 of the books and watched 21 of the movies 

 Question: How many more movies than books have you read?
[A]:
14