$$129 - ( - 2 ) ( 6 - ( 7 - 3 ) ) + ( 3 \times ( 5 + ( - 3 ) ) \times ( - 2 ) )$$
$121$
$$129-\left(-2\left(6-4\right)\right)+3\left(5-3\right)\left(-2\right)$$
$$129-\left(-2\times 2\right)+3\left(5-3\right)\left(-2\right)$$
$$129-\left(-4\right)+3\left(5-3\right)\left(-2\right)$$
$$129+4+3\left(5-3\right)\left(-2\right)$$
$$133+3\left(5-3\right)\left(-2\right)$$
$$133+3\times 2\left(-2\right)$$
$$133+6\left(-2\right)$$
$$133-12$$
$$121$$
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$11^{2}$
