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: A waiter had 13 customers. After some left he got 4 new customers. If he still had 9 customers 

 Question: How many customers left?

SOLUTION: 8

PROBLEM: Context: 2 red peaches, 6 yellow peaches and 14 green peaches are in the basket. 

 Question: How many more green peaches than yellow peaches are in the basket?

SOLUTION: 8

PROBLEM: Context: There were 5 roses and 3 orchids in the vase. Jessica cut some more roses and orchids from her flower garden. There are now 12 roses and 2 orchids in the vase. 

 Question: How many more roses than orchids are there in the vase now?

SOLUTION:
10