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: After a typhoon, 13 trees in Haley's backyard died. If she had grown 3 trees initially 

 Question: How many more trees died in the typhoon than those that survived?

SOLUTION: 23

PROBLEM: Context: Rachel had to complete 11 pages of math homework, 2 pages of reading homework and 3 more pages of biology homework. 

 Question: How many more pages of math homework than biology homework did she have?

SOLUTION: 8

PROBLEM: Context: Dave had 15 apps on his phone. He added 71 new apps. After deleting some he had 14 left. 

 Question: How many more apps did he delete than he added?

SOLUTION:
1