$$3-2-4 \times 5+3 \times 2+4-1$$
$-10$
$$1-4\times 5+3\times 2+4-1$$
$$1-20+3\times 2+4-1$$
$$-19+3\times 2+4-1$$
$$-19+6+4-1$$
$$-13+4-1$$
$$-9-1$$
$$-10$$
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