$$( \frac{ 36 }{ 8 } + \frac{ 25 }{ 5 } )-( \frac{ 60 }{ 18 } + \frac{ 50 }{ 6 } )=$$
$-\frac{13}{6}\approx -2.166666667$
$$\frac{9}{2}+\frac{25}{5}-\left(\frac{60}{18}+\frac{50}{6}\right)$$
$$\frac{9}{2}+5-\left(\frac{60}{18}+\frac{50}{6}\right)$$
$$\frac{9}{2}+\frac{10}{2}-\left(\frac{60}{18}+\frac{50}{6}\right)$$
$$\frac{9+10}{2}-\left(\frac{60}{18}+\frac{50}{6}\right)$$
$$\frac{19}{2}-\left(\frac{60}{18}+\frac{50}{6}\right)$$
$$\frac{19}{2}-\left(\frac{10}{3}+\frac{50}{6}\right)$$
$$\frac{19}{2}-\left(\frac{10}{3}+\frac{25}{3}\right)$$
$$\frac{19}{2}-\frac{10+25}{3}$$
$$\frac{19}{2}-\frac{35}{3}$$
$$\frac{57}{6}-\frac{70}{6}$$
$$\frac{57-70}{6}$$
$$-\frac{13}{6}$$
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$-\frac{13}{6} = -2\frac{1}{6} = -2.1666666666666665$
