$3\left(-2\right)^{2-1}$
$9x^2+126x+49$
$\lim\:_{y\to+\infty\:}\left(\frac{2y^2-3y}{y+1}\right)$
$\frac{x^6}{x^3}$
$\frac{dx}{dz}=e^x\sin\left(z\right)$
$\sqrt{192}+\sqrt{27}$
$\frac{1+\cos y}{1+\cos y}$
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