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: The grasshopper, the frog and the mouse had a jumping contest. The grasshopper jumped 14 inches. The mouse jumped 16 inches lesser than the frog who jumped 37 inches farther than the grasshopper. 

 Question: How much farther did the mouse jump than the grasshopper?
Example Output: 21

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

Example Input: Context: Paul got a box of 457 erasers and 617 crayons for his birthday. At the end of the school year he only had 523 crayons left while not having lost a single eraser. 

 Question: How many more crayons than erasers did he have left?
Example Output:
66