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: Baker made 54 cakes and 143 pastries. If he sold 68 cakes and 92 pastries 

 Question: How many more pastries than cakes did baker sell?
[EX A]: 24

[EX Q]: Context: Baker made 155 cakes. If his friend bought 140 cakes from him 

 Question: How many cakes would baker still have?
[EX A]: 15

[EX Q]: Context: Rachel picked 4 apples from her tree. If the tree had 7 apples initially. 

 Question: How many apples are still there on the tree?
[EX A]:
3