def METHOD_NAME(opt, dtype):
  local_step = math_ops.cast(opt.iterations + 1, dtype)
  beta_1_t = math_ops.cast(opt._get_hyper("beta_1"), dtype)
  beta_1_power = math_ops.pow(beta_1_t, local_step)
  beta_2_t = math_ops.cast(opt._get_hyper("beta_2"), dtype)
  beta_2_power = math_ops.pow(beta_2_t, local_step)
  return (beta_1_power, beta_2_power)