$6+-3x+1+-1x$
$-4\cdot32$
$k^3-3k+2$
$24-\left(-16\right)$
$64+\left(-140\right)-\left(-272\right)-\left(-475\right)-\left(670\right)$
$2x^2+x-28=0$
$x^2+x+56$
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