$\cos\left(\theta\:\right)=-\frac{1}{2}$
$\int\left(8x+9\right)^3dx$
$a^4b^6-2a^2b^3c+c^2$
$f\left(x\right)=x^3-9x$
$f\left(x\right)=\frac{3}{x^3-4}$
$\lim_{x\to0}\left(3x\right)^{-\sqrt{x}}$
$3\cdot\log\left(x-1\right)-\log\left(x-1\right)=0$
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