$$[7-\{2^{3}-7\}]\cdot(2-2)$$
$0$
$$\left(7-\left(8-7\right)\right)\left(2-2\right)$$
$$\left(7-1\right)\left(2-2\right)$$
$$6\left(2-2\right)$$
$$6\times 0$$
$$0$$
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