$-3x=-9$
$\left(ax^3+bx+c\right)^3$
$162uv-2u^5v$
$\cot\left(v\right)-\tan\left(v\right)=2\cot\left(2v\right)$
$x^3-729$
$\lim\:_{x\to\:\:1}\left(\frac{x^3-1}{x^3+2x^2+3x}\right)$
$x^3\:dy-ydx=0$
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