$\frac{d}{dx}sin\left(2xy\right)$

$2+2sen^2=4sen^2+2cos^2$

$\frac{dy}{dx}=\:36x\:+\:42y\:-\:4x^2\:-\:2xy\:-\:4y^2\:-\:20$

$x^23x+2.25$

$\frac{1}{2}\cdot\left|-2\right|-1$

$\int_0^{\frac{x}{4}}\left(\sec^4\left(x\right)\tan^4\left(x\right)\right)dx$

$\left(-2x+y-3z^2\right)^2$