i4+i2=2i^{4}+i^{2}=2i4+i2=2
i+i4+i3=1i+i^{4}+i^{3}=1i+i4+i3=1
i4n=−1,n∈Zi^{4 n}=-1, \mathrm{n} \in \mathbb{Z}i4n=−1,n∈Z
i2−1=0\mathrm{i}^{2}-1=0i2−1=0