Differential Equations

$\frac{d^2 y}{d x^2}-(x-1) \frac{d y}{d x}=0$

$(x-1) \frac{d^2 y}{d x^2}-\frac{d y}{d x}=0$

$\frac{d^2 y}{d x^2}+(x-1) \frac{d y}{d x}-y=0$

$(x-1) \frac{d^2 y}{d x^2}+\frac{d y}{d x}=0$