$$-2\times9-8x-2$$
$-8x-20$
$$-18-8x-2$$
$$-20-8x$$
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$4\left(-2x-5\right)$
$$2\left(-10-4x\right)$$
$$-4x-10$$
$$2\left(-2x-5\right)$$
$$4\left(-2x-5\right)$$