$\int\left(x^2+1\right)\left(x-2\right).dx$
$-x^2-10x-8=0$
$x^2-2x-15\ge0$
$\left(a+11\right)\left(a-9\right)$
$t^2+2t-1$
$19.7-\left(-0.5\right)$
$x^2+26x+88$
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