$\frac{d}{dx}\left(\arccot\left(2x^2\right)\right)$
$70\::\:-12$
$\int2e^{x+1}dx$
$\int7x\cdot e^{6x}\cdot dx$
$\sqrt[4]{-\:81}$
$\sqrt{2sec\left(x^2\right)-4}$
$\frac{t^{20}}{t^5r^3}$
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