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: 53 campers went rowing in the morning 48 campers went rowing in the afternoon and 49 campers went rowing in the evening. 

 Question: How many more campers went rowing in the morning than in the evening?
Example Output: 4

Example Input: Context: Marco and his dad went strawberry picking. Together their strawberries weighed 35 pounds. Marco's strawberries weighed 13 pounds. 

 Question: How much more did his dad's strawberries weigh than his?
Example Output: 9

Example Input: Context: Rebecca wants to split a collection of eggs into groups of 5. Rebecca has 20 eggs and 6 marbles. 

 Question: How many more eggs does Rebecca have than marbles?
Example Output:
14