$$\frac { - 7 } { 42 } + \frac { - 7 } { 21 } + \frac { 7 } { 84 } + \frac { 5 } { 6 }$$
$\frac{5}{12}\approx 0.416666667$
$$-\frac{1}{6}+\frac{-7}{21}+\frac{7}{84}+\frac{5}{6}$$
$$-\frac{1}{6}-\frac{1}{3}+\frac{7}{84}+\frac{5}{6}$$
$$-\frac{1}{6}-\frac{2}{6}+\frac{7}{84}+\frac{5}{6}$$
$$\frac{-1-2}{6}+\frac{7}{84}+\frac{5}{6}$$
$$\frac{-3}{6}+\frac{7}{84}+\frac{5}{6}$$
$$-\frac{1}{2}+\frac{7}{84}+\frac{5}{6}$$
$$-\frac{1}{2}+\frac{1}{12}+\frac{5}{6}$$
$$-\frac{6}{12}+\frac{1}{12}+\frac{5}{6}$$
$$\frac{-6+1}{12}+\frac{5}{6}$$
$$-\frac{5}{12}+\frac{5}{6}$$
$$-\frac{5}{12}+\frac{10}{12}$$
$$\frac{-5+10}{12}$$
$$\frac{5}{12}$$
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$\frac{5}{2 ^ {2} \cdot 3} = 0.4166666666666667$
