∀ {R : Type u_1} [inst : CommRing R] (W' : WeierstrassCurve.Affine R),
  (fun x => ∃ (_ : x ∈ fun xy => Polynomial.evalEval xy.1 xy.2 W'.polynomial = 0), True) = fun xy =>
    Polynomial.evalEval xy.1 xy.2 W'.polynomial = 0