$\frac{1}{2}\csc\left(\frac{2x}{3}\right)$
$\lim_{x\to0}\left(\frac{x^2-\sin^2\left(x\right)}{x^3}\right)$
$x^2<3x+4$
$\left(3a^3-a^2\right)$
$\int3f^2df$
$\left(3xy+4mn\right)^3$
$\frac{d}{dx}5x+2$
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