$$\frac{2}{9}-\frac{2}{6}+\frac{2}{8}-\frac{2}{2}$$
$-\frac{31}{36}\approx -0.861111111$
$$\frac{2}{9}-\frac{2}{6}+\frac{2}{8}-1$$
$$\frac{2}{9}-\frac{1}{3}+\frac{2}{8}-1$$
$$\frac{2}{9}-\frac{3}{9}+\frac{2}{8}-1$$
$$\frac{2-3}{9}+\frac{2}{8}-1$$
$$-\frac{1}{9}+\frac{2}{8}-1$$
$$-\frac{1}{9}+\frac{1}{4}-1$$
$$-\frac{4}{36}+\frac{9}{36}-1$$
$$\frac{-4+9}{36}-1$$
$$\frac{5}{36}-1$$
$$\frac{5}{36}-\frac{36}{36}$$
$$\frac{5-36}{36}$$
$$-\frac{31}{36}$$
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$-\frac{31}{36} = -0.8611111111111112$
