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: Winter is almost here and most animals are migrating to warmer countries. There are 8 bird families living near the mountain. If 42 bird families flew away to africa and 31 bird families flew away to asia 

 Question: How many more bird families flew away to africa than those that flew away to asia?
answer:
11


question:
Context: Winter is almost here and most animals are migrating to warmer countries. 86 bird families flew away for the winter from near a mountain. If there were 45 bird families living near the mountain initially 

 Question: How many more bird families flew away for the winter than those that stayed behind?
answer:

127


