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.

[Q]: Context: Paul got a box of 531 crayons and 38 erasers for his birthday. At the end of the school year he only had 391 left while not having lost a single erasers. 

 Question: How many more crayons than erasers did he have left?
[A]: 353


[Q]: Context: Jerry had some action figures on a shelf in his room. Later he added 2 more action figures to the shelf and removed 7 of the old ones. If there are 10 action figures on his shelf now 

 Question: How many action figures did he have initially on the shelf?
[A]: 15


[Q]: Context: Matthew had 31 crackers. He has 23 crackers left after he gave equal numbers of crackers to his 5 friends. 

 Question: How many crackers did Matthew give to his friends?
[A]:
8