If a complex number $z=x+i y$ represents a point $p(x, y)$ in the argand plane and $z$ satisfies the condition that the imaginary part of $\frac{z-3}{z+3 i}$ is zero, then the locus of the point $P$ is

$$ (\sqrt{3}+i)^{10}+(\sqrt{3}-i)^{10}= $$

Number of real values of $(-1-\sqrt{3 i})^{3 / 4}$ is

One of the values of $\sqrt{24-70 i}+\sqrt{-24+70 i}$ is