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.

Example Input: Context: Next on his checklist is wax to stick the feathers together. If he currently has 11 g of wax and the feathers require a total of 492 g of wax

Question: How many more grams of wax does he need?
Example Output: 481

Example Input: Context: There are 8 different books and 10 different movies in the ' crazy silly school ' series. If you read 19 of the books and watched 61 of the movies

Question: How many more movies than books are there in the ' crazy silly school ' series?
Example Output: 2

Example Input: Context: Ed had 29 more marbles than Doug. Ed lost 17 of his marbles at the playground.

Question: How many more marbles did Ed have than Doug then?
Example Output:
12