$x^5-\frac{20}{9}x^3+\frac{64}{81}x$
$\log\left(x-5\right)+\log\left(4x+3\right)=\log\left(x-5\right)+1$
$4t^2-3t+9=0$
$\frac{2x+6}{2}-x=3$
$8x^2+2$
$\frac{dy}{dx}\left(x\sqrt{5x-1}\right)$
$\frac{d}{dx}\frac{x^2+5}{x^2-1}$
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