$8\left(-2\right)\left(-1\right)$
$1+2+3+1+2+3$
$x^2+x-21$
$\frac{d}{dx}3x^2+3x-1$
$6x-2\left(x+3\right)+15$
$4x+16>0$
$-12-\left(-29\right)$
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