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: Mary is baking a cake. The recipe calls for 9 cups of sugar 7 cups of flour and 4 cups of salt. She already put in 2 cups of flour.

Question: How many more cups of flour than cups of salt does she need to add now?
[EX A]: 1

[EX Q]: Context: A grocery store had 81 bottles of regular soda, 60 bottles of diet soda and 60 bottles of lite soda.

Question: How many more bottles of regular soda did they have than diet soda?
[EX A]: 21

[EX Q]: Context: Rebecca wants to split a collection of eggs into groups of 5. Rebecca has 20 eggs and 6 marbles.

Question: How many more eggs does Rebecca have than marbles?
[EX A]:
14