$-x^3-3x^2-3x-3$
$3\:\sin u\:-\:\cos^2\:u\:-\:3\:=0$
$3x^2-x+8=0$
$-8\:-\left(-7\right)$
$\lim_{x\to0}\left(n\sin\left(\frac{\pi}{n}\right)\right)$
$\int x\left(-x^2-4\right)^5\:dx$
$\lim_{x\to0}\left(\frac{1-\cos^2\left(5x\right)}{3x}\right)$
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