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: Zachary did 51 push-ups in gym class today. David did 22 more push-ups than Zachary. John did 4 push-ups less than David. 

 Question: How many push-ups did John do?

SOLUTION: 69

PROBLEM: Context: For Gwen's birthday she received 3 dollars from her mom. Her dad gave her 6 more dollars. If she spent 4 dollars. 

 Question: How much more money did she receive from her dad than she did from her mom?

SOLUTION: 3

PROBLEM: Context: Dave had 24 apps and 9 files on his phone. After deleting some apps and files he had 5 files and 12 apps left. 

 Question: How many more apps than files does he have left on the phone?

SOLUTION:
7