$\left\{\begin{matrix}x=\frac{\sqrt{yz\left(yz^{3}+2yz^{2}+yz-4f-4\theta +4000000\right)}-yz^{2}+yz}{2yz}\text{; }x=\frac{-\sqrt{yz\left(yz^{3}+2yz^{2}+yz-4f-4\theta +4000000\right)}-yz^{2}+yz}{2yz}\text{, }&z\neq 0\text{ and }y\neq 0\\x\in \mathrm{C}\text{, }&\theta =1000000-f\text{ and }\left(z=0\text{ or }y=0\right)\end{matrix}\right.$

$f=-yz\left(x-1\right)\left(x+z\right)-\theta +1000000$