$$72+ \frac{ (-160) }{ 57 }$$
$\frac{3944}{57}\approx 69.192982456$
$$72-\frac{160}{57}$$
$$\frac{4104}{57}-\frac{160}{57}$$
$$\frac{4104-160}{57}$$
$$\frac{3944}{57}$$
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$\frac{2 ^ {3} \cdot 17 \cdot 29}{3 \cdot 19} = 69\frac{11}{57} = 69.19298245614036$