$\tan\left(70\right)\frac{300}{y}$

$6\:\cos \theta-3=0$

$\int4x\left(sqrt\left(2x+11\right)\right)dx$

$tan\left(\frac{\pi}{4}+x\right)=\frac{\left(cosx+sinx\right)}{cosx-sinx}$

$\frac{d}{dx}\sqrt{x^2+y^2}$

$\left(-\frac{5}{3}x^{2}y-\frac{3}{4}x^{3}\right)^{2}$

$\frac{dy}{dx}\left(x+tan\left(xy\right)=-1\right)$