$\frac{dy}{dx}\left(-3y^3-3y-2=-2x^2\right)$
$\frac{dy}{dx}=-2xy,\:y\left(0\right)=2$
$\cos3x\left(1+\cos^2\left(5x\right)\right)$
$\lim_{x\to0}\left(\frac{e^x}{\sqrt[3]{x}}\right)$
$2\cos\left(2x\right)+6\cos\left(x\right)-2$
$2x^3-7x^2+8x-3$
$-9-\left(-8\right)$
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