frac{(-1+isqrt3)^15}{(1-i)^20}+frac{(-1-...

`frac{(-1+isqrt3)^15}{(1-i)^20}+frac{(-1-isqrt3)^15}{(1+i)^20}` is equal to

A

`A.-64`

B

`B.-32`

C

`C.-16`

D

`D.frac{1}{16}`

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