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∑ a^2(a^4 - b^2c^2)(b^2 y - c^2 z) y z = 0
X(76), X(83), X(98), X(732), X(1670), X(1671), X(1691)
K653 is a circular pivotal cubic. The singular focus is X(14678).
See Table 1 and also Table 46.