$$729 \div 9 \div 3-15 \times 3 \div 9-2 \times 7+8 \times 5$$
$48$
$$\frac{729}{9\times 3}-\frac{15\times 3}{9}-2\times 7+8\times 5$$
$$\frac{729}{27}-\frac{15\times 3}{9}-2\times 7+8\times 5$$
$$27-\frac{15\times 3}{9}-2\times 7+8\times 5$$
$$27-\frac{45}{9}-2\times 7+8\times 5$$
$$27-5-2\times 7+8\times 5$$
$$22-2\times 7+8\times 5$$
$$22-14+8\times 5$$
$$8+8\times 5$$
$$8+40$$
$$48$$
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$2^{4}\times 3$