$sen\:\left(x+b\right)$
$4x^2+24x+9$
$\frac{dy}{dx}=\frac{-\left(y+4\right)}{x-4}$
$x+y-5z=3$
$2\sec\left(x\right)+\cot\left(x\right)$
$\left(-20+8\right)\::\:\left(\:-8+4\right)$
$\log_{11}\left(22\right)+\log_{11}\left(44\right)-3\log_{11}\left(2\right)$
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