$x^3\:dy-ydx=0$

$3\sec\left(x\right)^3-2\tan\left(x\right)^2-4$

$\frac{\tan^2\left(x\right)+\cot^2\left(x\right)+2}{\sec^2\left(x\right).\csc^2\left(x\right)}=1$

$cos\left(x+\frac{3\pi}{2}\right)=sinx$

$5tan^2\left(x\right)+5tan\left(x\right)-60=0$

$2\sqrt{2}\:senucosu\:-\:\:\sqrt{6}cosu\:+\:\sqrt{3}\:\:-2senu\:$

$x^2-6+36$