$$14\div_{2}^{907}7\times14+16-18-12-2$$
$670$
$$7\times 7\times 14+16-18-12-2$$
$$49\times 14+16-18-12-2$$
$$686+16-18-12-2$$
$$702-18-12-2$$
$$684-12-2$$
$$672-2$$
$$670$$
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$2\times 5\times 67$