$\lim_{x\to0}\pi^3$
$\frac{\left(e^x-2\right)e^x}{e^x+1}$
$\lim_{x\to5}\left(\frac{x^2-4x+8}{3x-15}\right)$
$-4t-t$
$\left(2x^2y^3\right)\left(3xz^2\right)\left(5y\right)$
$\cos\left(3x\right)\sin\left(x\right)-3\cos\left(3x\right)=0$
$\sqrt{4\sqrt{81}}+\sqrt[5]{32}$
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