$\left(x^3+1\right)\left(x^3-1\right)$
$\left(-21\right)+\left(32\right)+\left(+19\right)+\left(+47\right)+\left(-10\right)$
$-47+25-36+548$
$4\:x^2\:+20\:x\:+25\:=0\:$
$\lim_{x\to0}\left(\frac{x^2-1}{x^3-4x^2+4x-1}\right)$
$\:cos\:2\:x\:+\:2\:=\:\:sin\:x\:\:$
$\lim_{x\to0}\left(\frac{ln\left(x+1\right)-\frac{1}{3}.\sin\left(3x\right)+\sin\left(2x\right)}{x^2}\right)$
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