$\lim_{x\to0}\:\sqrt[3]{x^3-x-8}$
$\cos2x-2\sin^2x+3=2$
$\frac{d}{dx}\left(\left(x^2\right)\left(16-x^2\right)^{-\frac{1}{2}}\right)$
$r^2-26r+169$
$\int_{-1}^0\left(\frac{7x+2}{x^2+x-2}\right)dx$
$a^2-6a^2+12a-8$
$-19=x-19$
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