$\frac{2x^2-x-1}{x}$
$\lim_{x\to\infty}\left(\frac{x^3+3x^2+1}{6x-x^3+2}\right)$
$-x^2-3x-4<0$
$\int\left(\left(\tan\:\left(x\right)^2-1\right)^2\:\cdot\sec\left(x\right)^2\right)$
$6x^2<5x+6$
$\int x\left(\sqrt{x}+70\sin x\right)dx$
$\:x^5+x^4+3x^3+3x^2+2x+2$
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