$\frac{d}{dx}\left(2\left(\ln\:\left(x\right)+1\right)\right)$
$x^2+5x-49$
$6cos^25x\:-\:3$
$\frac{2.8\left(1.2\right)}{-3}$
$\left(8z-9\right)^2$
$27^{3n+6}+27^{3n+6}$
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