Perform the indicated calculation. Give your answer in the form z = a + bi
not sure how to go about it
All what you have to use is the [elementary] rule...
$\displaystyle (a^{b})^{c}= a^{b\cdot c}$
... and the [less elementary] Euler's formula...
$\displaystyle e^{i\cdot x}= \cos x + i\cdot \sin x$
Kind regards
$\displaystyle \chi$ $\displaystyle \sigma$