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: Mary is baking a cake. The recipe calls for 10 cups of flour 2 cups of sugar and 80 cups of salt. She already put in 7 cups of flour. 

 Question: How many more cups of flour than cups of sugar does she need to add now?

SOLUTION: 1

PROBLEM: Context: Danny collects bottle caps. He threw away 6 of the old ones at the park while he found 50 bottle caps new ones. Now he has 60 bottle caps in his collection. 

 Question: How many more bottle caps did danny find at the park than those he threw away?

SOLUTION: 44

PROBLEM: Context: Every day Ryan spends 7 hours on learning english and some more hours on learning chinese. If he spends 2 hours more on learning english than on learning chinese 

 Question: How many hours does he spend on learning chinese?

SOLUTION:
5