$$45/(-9)+24-81/9-24+12-6/(-2)=$$
$1$
$$-5+24-\frac{81}{9}-24+12-\frac{6}{-2}$$
$$19-\frac{81}{9}-24+12-\frac{6}{-2}$$
$$19-9-24+12-\frac{6}{-2}$$
$$10-24+12-\frac{6}{-2}$$
$$-14+12-\frac{6}{-2}$$
$$-2-\frac{6}{-2}$$
$$-2-\left(-3\right)$$
$$-2+3$$
$$1$$
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