The math problem: (-1/16)^(2/3) produces an error in Excel.
However, ((-1/16)^2)^(1/3) does not.
Neither does: ((-1/16)^(1/3))^2
Why is that?
Guess it's that -1/16 with the attempt to raise it to the 2/3 power or the positive 0.6666 power.
Those negatives just have a problem when intermixed in power problems.
Almost gives the impression the problem doesn't have a real solution, but it does actually.