$\frac{\left(x^3-64\right)}{x-2}$
$x-\sqrt{x^2-8}=4$
$\frac{x^2+2}{x^3+9x^2+27x+27}$
$\cos^{-1}\left(\frac{3.7}{5.4}\right)$
$\left(x^2-xy\right)\left(x^3+x^2y\right)$
$\frac{dy}{dx}=-0.001x^{0.5}-0.3x-0.25x^2$
$x\:3\:+\:x\:5\:-\:x\:7$
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