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.

Context: 22 children were riding on the bus. At the bus stop 40 children got on the bus while some got off the bus. Then there were 2 children altogether on the bus. 

 Question: How many children got off the bus at the bus stop?
60

Context: Paul had 51 books and 106 pens. After selling some books and pens in a garage sale he had 82 books and 14 pens left. 

 Question: How many pens did he sell in the garage sale?
92

Context: Nell collects baseball cards. She had 528 cards while Jeff had 11 cards. She gave some of her cards to jeff and now has 252 cards left. 

 Question: How many cards did Nell give to Jeff?

276