$\tan^2\left(x\right).\cos^2\left(x\right)+\tan^2\left(x\right).\sin^2\left(x\right)=\tan^2\left(x\right)$
$-8csc^2\left(4x\right)$
$\frac{dy}{dx}=-xy^{-1}$
$1296\cdot1.375$
$\log x=\log\left(x+3\right)-\log\left(2\right)$
$2x^2-x+3<0$
$\tan^{-1}\left(\frac{8}{10}\right)$
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