=> Post(transformations.ToDictionary(x => x.Op, x => x.Transformation));
=> LeftToRight(transformations.ToDictionary(x => x.Item1, x => x.Item2));
=> Post(transformations.ToDictionary(x => x.Op, x => x.Transformation));
=> LeftToRight(transformations.ToDictionary(x => x.Item1, x => x.Item2));