$\frac{d}{dx}\sqrt[3]{cosx}$
$\frac{5x}{2}\left(7x^2-4y+8z\right)$
$x^2-18x+16+8x^2+25x-16$
$\tan^2+3=0$
$a^2-2ac+c^2$
$x+3>41$
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