instruction:
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.
question:
Context: Jerry had 8 action figures on a shelf in his room. Later he added 4 more action figures to the shelf and removed 5 old ones. 

 Question: How many action figures were on his shelf in all?
answer:
7


question:
Context: Jack received 9 emails in the morning, 10 emails in the afternoon and 7 emails in the evening. 

 Question: How many more emails did Jack receive in the morning than in the evening?
answer:
2


question:
Context: After eating a hearty meal they went to see the Buckingham palace. There were 39 paintings in the Buckingham palace. There, Rachel learned that 661 visitors came to the Buckingham palace that day. If there were 600 visitors the previous day 

 Question: How many more visitors visited the Buckingham palace on that day than on the previous day?
answer:

61