$$[5-\{3^{2}-5\}]\cdot(3-4)$$
$-1$
$$\left(5-\left(9-5\right)\right)\left(3-4\right)$$
$$\left(5-4\right)\left(3-4\right)$$
$$1\left(3-4\right)$$
$$1\left(-1\right)$$
$$-1$$
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