$\left(1-\cos\left(x^2\right)\right)\cot\left(x^2\right)=\cos\left(x^2\right)$
$2x^2y^2\:+\:3x^2y^2\:-\:8x^2y^2\:+\:7x^2$
$\frac{x^6-27^3}{x^2-3y}$
$5x-3>\frac{x}{3}$
$50.6-800$
$\lim_{w\to+\infty}\frac{2w^2-2w-2}{w^2-1}$
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