$dy=x\left(2ydx-xdy\right)$

$\sec^2x=3\tan x-1$

$\frac{dy}{dx}\left(2y^2-xy-5+x^3=0\right)$

$\frac{\cos\left(1\right)}{\sec\left(1\right)}+\frac{\sin\left(1\right)}{\csc\left(1\right)}$

$\frac{5}{\sqrt{5}}\left(\frac{2}{3}\right)x^{\frac{3}{2}}$

$144\cdot6$

$2x\le2x+1$