TASK DEFINITION: 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.
PROBLEM: Context: 36 children were riding on the bus. At the bus stop 68 children got off the bus while some more got on the bus. Then there were 12 children altogether on the bus.

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

SOLUTION: 24

PROBLEM: Context: Julia played tag with 15 kids on monday, 18 kids on tuesday and 7 kids on wednesday.

Question: How many more kids did she play with on monday and tuesday than on wednesday?

SOLUTION: 26

PROBLEM: Context: Paco had 40 sweet cookies and 25 salty cookies. He ate 28 salty cookies and 15 sweet cookies.

Question: How many more salty cookies than sweet cookies did he eat?

SOLUTION:
13