A complex equation

Euler made a fantastic complex equation e to the power of i theta equals cos theta plus i sin theta.

I tried very hard to get a similar beautiful equation. I managed a little and made the following equation.

How do you find it? Please comment below so that I can get a feedback. Have a nice day, dear readers !!

(The above is wrong)

(Added on 31/03/2021). Here is a correct complex equation. 

Thanks Wolfram alpha once again!!