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.
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Question: Context: Zachary did 44 push-ups and 17 crunches in gym class today. David did 29 more push-ups but 13 less crunches than zachary.

Question: How many crunches did David do?

Answer: 4

Question: Context: 28 children were riding on the bus. At the bus stop 82 children got on the bus while some got off the bus. Then there were 30 children altogether on the bus.

Question: How many more children got on the bus than those that got off?

Answer: 2

Question: Context: Jake brought 6 balloons to the park. If Jake brought 4 more balloons than the number of balloons that Allan brought

Question: How many balloons did Allan bring to the park?

Answer:
2