$\sin\left(80\right)\cos\left(35\right)-\cos\left(80\right)\sin\left(36\right)$
$\frac{e^x}{y}\frac{dy}{dx}=x^2+1$
$\lim_{x\to0}\left(\frac{4-\sqrt{x+15}}{x^2-1}\right)$
$-58\:.\:99\:.\:-66$
$\frac{x-2}{x}<5$
$\frac{dy}{dx}=5x^3-10x^2+2$
$\frac{4x^2}{2x^3}$
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