This question has two parts. First, answer Part A. Then, answer Part B.
Part A
The expressions in the table represent the number of canned goods collected by two homerooms during a charity food drive.



Homeroom Cans Collected
Mr. Juarez 8n−7
Ms. Wade 6n+3


Write an expression that shows the total number of cans collected by both homerooms.

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Part B
The students in Mr. Juarez's homeroom collected more cans than students in Ms. Wade's homeroom. Write an expression that represents how many more cans were collected.