$\frac{\tan\left(4x\right)}{1-\tan\left(4x\right)^2}$
$3\tan^2x-2=5\sec^2x-9$
$x^3y^2z^6x^{-1}yz^{-5}$
$\frac{d^2}{dx^2}\left(log\left(1+4x\right)\right)$
$\frac{6x^2-10x-24}{2x-3}$
$\int3x\:cscx^2\:dx$
$5a+35$
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