I have one question here regarding complex number in exponential form,

Is the following statement true?

$\displaystyle e^{i\frac{-\pi}{2}}=e^{i\frac{3\pi}{2}}$

Some ppl say that their power series are not equal, so the statement is wrong.

But to me, it seems like they are equal, right?

Anyone can clarify my doubt? Thanks!!!