$\frac{\tan\left(x\right)}{1-\cos\left(w\right)}=\csc\left(x\right)\left(1-\sec\left(x\right)\right)$
$\frac{4x^2-12x+5}{x-1}$
$24\cdot25$
$\left(+6\right)\::\:\left[\left(+5\right)\:-\:\left(+7\right)\right]$
$\left(2+\sqrt{-1}\right)^3$
$8x-24>24$
$\frac{d}{dx}\:tan\:x\:+\:sec\:x=\:3x$
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