I came up with a formula for calculating the amount of cubees in any nxn

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n³-(n³-2)

Let’s use an example of a 5x5:
5³=125
3³=27
125-27=98
There are 98 cubees in a 5x5.
Please let me know if there’s a simpler way of showing this.

This doesn’t work for 2x2 btw. Just... use common sense
 
n³-(n³-2)

Let’s use an example of a 5x5:
5³=125
3³=27
125-27=98
There are 98 cubees in a 5x5.
Please let me know if there’s a simpler way of showing this.
I think you mean (n-2)³ instead of (n³-2)

Edit: and it would work for 2x2 as this would give you 2³-0=8, and there are only 8 cubees in a 2x2
 
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Yup, that's right, and it works for everything 2x2 and up. It could also be written as 6n^2 - 12n + 8 (not that this way is prettier or more understandable, but it does eliminate the need for raising anything to the third power).
 
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