$3587-1824$
$6=n-1$
$\lim_{x\to2}\left(\frac{x^2-8}{\sin\left(x-2\right)}\right)$
$x^2=c-2y^2$
$4x+2x-3x+4x\:$
$\tan a=\tan a\cdot\csc^2a+\cot\left(-a\right)$
$4-5-6+2-2+14-23+16$
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