$-x^2+105x$
$x-\sqrt{x-1}=1$
$\lim_{x\to\frac{1}{2}}\left(\frac{\cos\left(x\right)}{1-\sin\left(x\right)}\right)$
$-3>-2-v$
$-2+4+3+1$
$\lim_{x\to2}\left(\frac{2x^2-11x+14}{x-2}\right)$
$7x^4+2y\:\cdot\:3x^5-y$
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