$$17- \{ 5-3+[8-(-1-3)+5] \}$$
$-2$
$$17-\left(2+8-\left(-1-3\right)+5\right)$$
$$17-\left(2+8-\left(-4\right)+5\right)$$
$$17-\left(2+8+4+5\right)$$
$$17-\left(2+12+5\right)$$
$$17-\left(14+5\right)$$
$$17-19$$
$$-2$$
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