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: Jerry had 7 action figures and 2 books on a shelf in his room. Later he added 4 more books to the shelf. 

 Question: How many more action figures than books were on his shelf?

SOLUTION: 1

PROBLEM: Context: 3 birds were sitting on the fence. 2 more birds and 6 more storks came to join them. 

 Question: How many more storks than birds are sitting on the fence?

SOLUTION: 1

PROBLEM: Context: The school is planning a field trip. The school has 102 classrooms. There are 11 students in the school and 99 seats on each school bus. If 8 students do n't want to go for the trip 

 Question: How many students are going on the trip?

SOLUTION:
3