The square of the difference of n and 2, increased by twice n

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The square of the difference of n and 2, increased by twice n

The difference of n and 2:
n - 2
The square of the difference of n and 2 means we raise (n - 2) to the 2nd power:
(n - 2)^2

Twice n means we multiply n by 2:
2n

The square of the difference of n and 2, increased by twice n
(n - 2)^2 + 2n