$\left(-6,0\right)$\left(-6,0\right)

$\left(0,6\right)$\left(0,6\right)

$\left(-\infty,-6\right)\cup\left(0,+\infty\right)$\left(-\infty,-6\right)\cup\left(0,+\infty\right)

$\left(-\infty,0\right)\cup\left(6,+\infty\right)$\left(-\infty,0\right)\cup\left(6,+\infty\right)