If $y=A t^2+\frac{B}{t}$ ( $A, B$ are parameters) is general solution of the differential equation $f(t) y^{\prime \prime}(t)+g(t) y^{\prime}(t)+h(t) y=0$ then $2 f(t)+t^2 h(t)=$

The general solution of the differential equation $(2 x-y)^2 d y-2(2 x-y)^2 d x-2 d x=0$ is

The general solutions of the differential equation $x \log x d y=(x \log x-y) d x$ is

The general solution of the differential equation $\left(x \sin \frac{y}{x}\right) d y=\left(y \sin \frac{y}{x}-x\right) d x$ is