$x^2=2+x$
$-4x^2+2x$
$48-8+31-9+7-9-8$
$\left(8-c^2\right)\left(8+c^2\right)$
$\left(x+2\right)\left|\left(x+2\right)^2-4x+\left(x-2\right)^2\right|-16$
$\left(12+3\right)-\left(5+8\right)$
$3n^2-60n+300$
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