Power operator for fractional powers

I get an error when trying to calculate the fifth root of a any negative number.
My formula is
(-3.3)^(.2).

Can you help?

This works for me:
(-3.3)^(1/5)

That gives me the wrong answer altogether.
It give 19.
The answer should be -1.26.

@adevaraj - Can you please try out in the below manner?

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