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.

[EX Q]: Context: For Gwen's birthday she received 7 dollars. She spent some money and has 5 dollars left with her. 

 Question: How much money did she spend?
[EX A]: 2

[EX Q]: Context: There were some roses in the vase. Jessica cut 16 more roses from her flower garden and put them in the vase. There are now 23 roses in the vase. 

 Question: How many roses were there in the vase at the beginning?
[EX A]: 7

[EX Q]: Context: Robin's hair was 17 inches long. He cut off some inches of her hair. If his hair is now 13 inches long 

 Question: How much of his hair did he cut?
[EX A]:
4