You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

[Q]: James ate 22 carrot sticks before dinner and 15 more after dinner . How many carrot sticks did he eat ?
[A]: 37


[Q]: The Litter Patrol picked up 10 glass bottles and 8 aluminum cans on Saturday . How many pieces of litter did they pick up altogether ?
[A]: 18


[Q]: Craig has 20 apples . Judy has 11 apples . He shares 7 with Eugene . How many apples will Craig have ?
[A]:
13