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.
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Question: Context: A grocery store had a total of 30 bottles of which 28 were bottles of regular soda and the rest were bottles of diet soda.

Question: How many bottles of diet soda did they have?

Answer: 2

Question: Context: Haley grew 13 trees in her backyard. After a typhoon 6 died.

Question: How many more trees survived the typhoon than those that died?

Answer: 1

Question: 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?

Answer:
14