$\frac{d}{dx}-4x^2+2x-3$

$\frac{dy}{dx}=\frac{y}{4x-x^2}$

$2\left(-3\right)^3+5\left(-3\right)^2-3$

$\int x\left(\frac{\left(\sqrt{x}-y\right)^2}{2\pi}\right)dx$

$\frac{12xy^2-10x^3y^5}{-4x^5y^2}$

$f\left(x\right)=\sqrt{\frac{x^2-9}{x}}$

$\cos\left(x\right)=\frac{-1}{\sqrt{5}}$