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.
--------
Question: Context: A book has 2 chapters. The second chapter is 36 pages long. If there are a total of 67 pages in the book 

 Question: How many pages are in the first chapter?

Answer: 31


Question: Context: Paul had 50 books. After buying some in a garage sale he had 151 left. 

 Question: How many books did he buy?

Answer: 101


Question: Context: Baker made 81 cakes. Then he made 92 more cakes. He sold 46 of them. 

 Question: How many more cakes did baker make than those he sold?

Answer:
127