$\frac{dy}{dx}=3x^2y,\:y\left(0\right)=7$
$8\left(sec^2x-1\right)\left(secx-1\right)$
$\frac{d^2}{dx^2}\left(4x^2-e^x\right)$
$x^2-5x\ge\:-8$
$x^2+1x+49$
$\lim_{x\to4}\left(\frac{x}{x^2-16}\right)$
$\left(x-5\right)\left(x+1\right)\left(x-2\right)$
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