$\log_ax$
$\sqrt{x^2}-9$
$-58\:-\:\left(-27\right)$
$x\left(x-8\right)\left(x+5\right)$
$x^2-6x+14\ge0$
$-\left(\:x\:+\:y\:+\:z\:\right)\:-\left(\:x\:-\:2y\:\right)-\:\left(\:15y\:+\:16z\:-\:12x\:\right)$
$61\cdot3\cdot6$
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