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X(1), X(2), X(6), X(75), X(76), X870), X(984), X(1423) 

K286 is the isogonal transform of K285. It is a conicopivotal isotomic cubic with root X(874) and node G. For any point M, let M' = GM /\ KM* (M* isogonal conjugate of M). Denote by (L) the trilinear polar of X(660) i.e. the line X(1)X(39). M' lies on (L) if and only M lies on K286. 
