$\sqrt{2x-1}=1$
$-2x-46\le0$
$1+\sec^{2}30^{\circ}$
$-\frac{15b}{2}-b$
$\left(x+1\right)\left(\sqrt{2-x}\right)$
$\lim_{x\to2}\left(\frac{3x+14}{2x+1}\right)$
$121x^8-100$
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