$$-p+[8q-\{5p-(3q-\overline{7r-3-r^{2}})\}\_$$
$-6p+11q-r^{2}-7r-3$
$$-p+8q-\left(5p-3q+7r+3+r^{2}\right)$$
$$-p+8q-5p+3q-7r-3-r^{2}$$
$$-p+11q-5p-7r-3-r^{2}$$
$$-6p+11q-7r-3-r^{2}$$
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