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X(4), X(6), X(25), X(30), X(74), X(113), X(1495), X(1989), X(1990)

vertices of the orthic triangle

K1, K2 : infinite points of the circumconic with perspector X(32)

O1, O2 = bicentric pair PU(4)

K496 is the cubic Kc2(X4) in CL053.

It is the pK with pivot H and isopivot X(1495), the midpoint of X(23)-X(110).