You are given a math word problem and you are supposed to apply an addition mathematical operator on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

[EX Q]: Context: 21 children were riding on the bus. At the bus stop 10 children got off the bus while some more got on the bus. Then there were 16 children altogether on the bus. 

 Question: How many children got on the bus at the bus stop?
[EX A]: 5

[EX Q]: Context: Rachel has 3 apple trees. She picked 8 apples from each of her trees. Now the trees have a total 9 apples still on them. 

 Question: How many apples were there on all trees initially?
[EX A]: 33

[EX Q]: Context: Haley grew some trees in her backyard. After a typhoon 5 died. If 12 trees were left 

 Question: How many trees did she grow?
[EX A]:
17

