$$- \frac{ 7 }{ 9 } +( \frac{ 5 }{ 6 } +- \frac{ 4 }{ 3 } )$$
$-\frac{23}{18}\approx -1.277777778$
$$-\frac{14}{18}+\frac{15}{18}-\frac{4}{3}$$
$$\frac{-14+15}{18}-\frac{4}{3}$$
$$\frac{1}{18}-\frac{4}{3}$$
$$\frac{1}{18}-\frac{24}{18}$$
$$\frac{1-24}{18}$$
$$-\frac{23}{18}$$
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$-\frac{23}{18} = -1\frac{5}{18} = -1.2777777777777777$
