+ 2
2**5 = 2^5
= 2*2*2*2*2 = 32
8**2 = 8^2 = 8*8 = 64
//**1/2 = ^1/2 -> square root
//**-1/2 = ^-1/2 -> 1/square root
4**(1/2) = 2 (sqrt(4))
4**(-1/2) = 0.5 (1/sqrt(4))
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