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.

Context: Jerry had 7 action figures on a shelf in his room. Later he added some more action figures to the shelf and removed 10 of the old ones. If there are 8 action figures on his shelf now 

 Question: How many action figures did he add to the shelf?
11

Context: A grocery store had 72 bottles of regular soda, 32 bottles of diet soda and 78 apples. 

 Question: How many more bottles than apple did they have?
26

Context: Dave had 17 apps on his phone. After adding some he had 18 left. 

 Question: How many apps did he add?

1