$\cos^{-1}\left(\cos\left(\pi\right)\right)$
$x^2-4-117$
$\int\left(\frac{4}{\left(x+5\right)^6}\right)dx$
$\int\frac{-2t^5}{\sqrt{t^2+2}}dt$
$\frac{sin\:x}{cos\:x}+\frac{cos\:x}{sin\:x}=\frac{1}{cos\:x\:sin\:x}$
$\frac{dy}{dx}=x+4y$
$\lim_{x\to-3}\left(3x+4\right)\left(7x-9\right)$
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