SuperCube Solution
The Supercube is actually very simple to solve.  Just solve the cube as a normal 3x3, paying attention to piece positions, then when you get to the centers of the cube, use the algorithms below to correct the position of the cube centers.
90 degree top and left center rotation
MF MU' MF' U MF MU MF' U'
180 degree top center rotation
(R U R' U) x5
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