$189\:\cdot1.63$
$\frac{3x^3-5x^3+4}{x+1}$
$byx+byz-by$
$x^2+2x-48\ge0$
$\lim_{x\to\frac{\pi}{2}}\left(\cos\left(x\right)\right)^{\left(\frac{\pi}{2}-x\right)}$
$8x^2+10x-12$
$\left(-2xy^2+9xy^3\right)\left(2xy^2+xy^3\right)$
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