$\sqrt{x-2}\left(x-4\right)$

$\frac{dy}{dt}=2ty+1$

$\cos\left(3x\right)\sin\left(5x^2\right)$

$\tan^2\left(x\right)=\sin^2\left(x\right)+\sin^2\left(x\right)\cdot\tan^2\left(x\right)$

$12m^3n^3-18m^2n^2+24m^4n^4$

$5x=40$

$\frac{2\tan\left(y\right)}{1-\tan^2\left(y\right)}+\frac{1}{2\cos^2\left(y\right)-1}$