(motive : Lean.Expr → Sort u_1) →
  (x : Lean.Expr) →
    ((declName : Lean.Name) →
        (type value b : Lean.Expr) → (nondep : Bool) → motive (Lean.Expr.letE declName type value b nondep)) →
      ((x : Lean.Expr) → motive x) → motive x