$$3(52-7)-2(92-11)-4(82-13)-12$$
$-315$
$$3\times 45-2\left(92-11\right)-4\left(82-13\right)-12$$
$$135-2\left(92-11\right)-4\left(82-13\right)-12$$
$$135-2\times 81-4\left(82-13\right)-12$$
$$135-162-4\left(82-13\right)-12$$
$$-27-4\left(82-13\right)-12$$
$$-27-4\times 69-12$$
$$-27-276-12$$
$$-303-12$$
$$-315$$
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