$x^{12}-\:8x\:^6+16$
$\int\sqrt{x^2+49}\:dx$
$\frac{x^2+2x+x^2-2}{x^2+1}$
$\frac{x}{x+3}\ge2$
$\lim_{x\to\infty}\left(\frac{x^2+x+8}{x-3}\right)$
$\frac{x}{2}+7\le-12$
$12x^22+3xw$
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