Once you master the NxN system, a 7x7 feels exactly like a 3x3—just with a few extra steps.
Generalization for n×n×n (even): use the same algorithm on the innermost slice pair. xnxnxnxn cube algorithms pdf nxnxn rubik cube link
: Combine individual "wing" pieces into completed edge blocks. Once you master the NxN system, a 7x7
Here is the standard structure of a reliable : Once you master the NxN system