How to solve a Rubik's cube 7х7 - Step 4
At the beginning of this stage, you should have the upper cross assembled.
At the end of the stage you should have the entire top verge assembled.
Apply the formulas for the second step of assembling a 3x3 cube. We assemble the upper face. Find one of the corner cubes of the upper face, and place it on the lower face. Now, depending on how the colors stand up, do the operation shown below.
Repeat the operation with the remaining three corner cubes of the top face.
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