Let $f(x)=3 x^{2}-5$ And $g(x)=\frac{2}{x} \text {. }$ Find the Function $f \circ g$

Let $f(x)=3 x^{2}-5$ and $g(x)=\frac{2}{x} \text {. }$ Find the function $f \circ g$ Give the domain of $f \circ g .$