$$=\frac{2}{2-6+1+1-(-1+3)}$$
$-\frac{1}{2}=-0.5$
$$\frac{2}{-4+1+1-\left(-1+3\right)}$$
$$\frac{2}{-3+1-\left(-1+3\right)}$$
$$\frac{2}{-2-\left(-1+3\right)}$$
$$\frac{2}{-2-2}$$
$$\frac{2}{-4}$$
$$-\frac{1}{2}$$
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$-\frac{1}{2} = -0.5$