$3\sqrt{x^{10}}$

$f\left(4\right)=-2\sqrt{x^3}+\frac{2}{\sqrt{x}}$

$\frac{dy}{dx}\:+\:\frac{y}{x}\:=1$

$\frac{dy}{dx}=e^{-15x}$

$\frac{4x}{x-4}x-4=\frac{16}{x-4}$

$w^2-5w+\frac{25}{5}$

$\frac{csc\left(x\right)}{1+sen\left(x\right)}=sec^2\left(x\right)\cdot\:\left(csc\left(x\right)-1\right)$