$\frac{d}{dx}\left(\frac{e^{2x}-1}{e^{2x}+1}\right)$
$\log\left(2x-8\right)=\log\left(4x+7\right)$
$5u^2-5u-100=0$
$\left(d^3+4v^z\right)^2$
$\frac{d}{dx}ln9$
$\left(8x-3x-10x-9\right)\left(-5x+6x\right)$
$\frac{z-17}{-2}=-1$
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