$\left(3a^3+2\right)\left(3a^3-9\right)$
$\lim_{x\to\infty}\left(\frac{2x^3-1}{x}\right)$
$\frac{\sin\:\left(\cos\:\left(\theta\:\right)+\sin\:\left(\theta\:\right)\right)}{\left(1+\cos\:\left(\theta\:\right)\right)\left(1-\cos\:\left(\theta\:\right)\right)}=1+cot$
$-\int\csc\left(x\right)dx$
$\left(-2+3x+z\right)^2$
$\frac{1}{x+6}-\frac{x^2-3x-18}{x^2+12x+36}=\frac{4}{x+6}$
$x^2\left(\frac{x^3+2x^2}{3}\right)$
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