$$665-5 \times 6+4 \times 8 \times 10-250$$
$705$
$$665-30+4\times 8\times 10-250$$
$$635+4\times 8\times 10-250$$
$$635+32\times 10-250$$
$$635+320-250$$
$$955-250$$
$$705$$
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$3\times 5\times 47$
