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: There were 3 dollars in Olivia's wallet. She collected 49 more dollars from an atm. After she visited a supermarket there were 49 dollars left. 

 Question: How much more money did she collect at the atm than she spent at the supermarket?
[A]: 46


[Q]: Context: Robin cut off 13 inches of his hair. If his hair was 14 inches long initially 

 Question: How long is his hair now?
[A]: 1


[Q]: Context: David did 51 push-ups in gym class today. David did 49 more push-ups than Zachary. 

 Question: How many push-ups did Zachary and David do altogether?
[A]:
53