Gjej x (complex solution)
x=\left(-\frac{1}{2}i\right)\ln(\left(-i\right)y+ix_{3}+\left(-i\right)\left(-1+\left(y+\left(-1\right)x_{3}\right)^{2}\right)^{\frac{1}{2}})+\pi n_{1}\text{, }n_{1}\in \mathrm{Z}
x=\left(-\frac{1}{2}i\right)\ln(\left(-i\right)y+ix_{3}+i\left(-1+\left(y+\left(-1\right)x_{3}\right)^{2}\right)^{\frac{1}{2}})+\pi n_{2}\text{, }n_{2}\in \mathrm{Z}
Gjej x_3
x_{3}=\sin(2x)+y
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