Target up to 3 «Mathmech» monsters in your GY with different names, then activate 1 of these effects;
• Special Summon them, but their effects are negated, then, immediately after this effect resolves, Synchro Summon 1 «Mathmech» Synchro Monster using only those monsters, and shuffle the materials into the Deck instead of sending them to the GY.
• Special Summon them, but their effects are negated, then, immediately after this effect resolves, Xyz Summon 1 «Mathmech» Xyz Monster using only those monsters.
You can only activate 1 «Mathmech Superfactorial» per turn.