Twelve identical resistors, each with resistance \(R\), are connected together to form the edges of a three-dimensional cube. A potential difference \(V_0\) is applied across two diametrically opposite vertices, \(A\) and \(B\), along the body diagonal of the cube. Which of the following expressions represents the equivalent resistance \(R_{\text{eq}}\) of the cube network between vertices \(A\) and \(B\)?