$358.05+65$
$x^2\:\le16$
$\left(5a-4b-c\right)^2$
$5+7-\left(-6\right)+4-\left(+9\right)+\left(-2\right)$
$5x^2-13x-8$
$6x^2-13x+6<0$
$\lim_{x\to20}\left(\frac{x^2-40x+400}{sin^2\left(\pi x\right)}\right)$
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