n^2 (aka n squared) divided by n is equal to n
n^3 (n cubed) divided by n^2 is equal to n
-e^(pi*i) is equal to 1
i is an imaginary number which is equal to the square root of -1
pi is the circumference of a circle divided by it's diameter
it's from Euler's formula which states for any real number x:
e^(ix)= cos(x) + isin(x).
Since cos(π) = -1 and sin(π) = 0, e^(iπ) = -1 + 0i, which gives:
e^(iπ) + 1 = 0 and e^(iπ) = -1, therefore:
-(e^(iπ)) = 1
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