  We review the classical properties of Tremblay-Turbiner-Winternitz and
Post-Wintenitz systems and their relation with N-dimensional rational Calogero
model with oscillator and Coulomb potentials, paying special attention to their
hidden symmetries. Then we show that combining the radial coordinate and
momentum in a single complex coordinate in proper way, we get an elegant
description for the hidden and dynamical symmetries in these systems related
with action-angle variables.
