Solve the differential equation $\left(1-x\right)y^{''}-4xy^{\prime}+5y=\cos\left(x\right)$

Find the derivative

$\frac{d}{dx}\left(x^2+y^2=25\right)$

Find the derivative

$\frac{d}{dx}\left(4x^2+y^2=8\right)$

Find the derivative

$\frac{d}{dx}\left(x^2+xy-y^2=1\right)$

Find the derivative

$\frac{d}{dx}\left(y=\sec\left(x\right)\right)$

Find the derivative

$\frac{d}{dx}\left(x^3-x^3 y^2=3\cdot \sqrt{\pi}\right)$

Find the derivative

$\frac{d}{dx}\left(\frac{\ln\left(x^2\right)}{x^2}\right)$

Find the derivative

$\frac{d}{dx}\left(\frac{x}{a}=5\right)$