e^(i*pi)+1

$$\\\small{\text{ In mathematics, Euler's identity (also known as Euler's equation) is the equality $e^{i \pi} + 1 = 0$ }}$$

e^πi = -1   --->   e^πi + 1 = 0

E^(ipi) + 1

=Cos pi + isin pi +1

=  -1      +  I × 0.   +1

=  -1 + 1

=0