Big cubes require a more complex notation than the standard 3x3 to account for multiple internal layers.
A PDF dedicated to will typically organize algorithms by these three phases, plus a dedicated parity section. Xnxnxnxn Cube Algorithms PDF Nxnxn Rubik Cube...
Algorithm: R2 U2 R2 Uw2 R2 Uw2 Effect: Swaps two opposite edge groups. Big cubes require a more complex notation than