instruction:
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: 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?
answer:
60

question:
Context: A book has 3 chapters. The first chapter is 91 pages long the second chapter is 23 pages long and the third chapter is 25 pages long.

Question: How many more pages does the first chapter have than the second chapter?
answer:
68

question:
Context: There were 7 roses and 12 orchids in the vase. Jessica cut some more roses and orchids from her flower garden. There are now 11 roses and 20 orchids in the vase.

Question: How many more orchids than roses are there in the vase now?
answer:
9