def METHOD_NAME(x: np.ndarray) -> np.ndarray:
    sign = np.sign(x)
    x = np.abs(x)
    s = one / (x * x)
    R = rb(s)
    S = sb(s)
    # z = x
    # SET_LOW_WORD(z, 0)
    # r = np.exp(-z * z - 0.5625) * np.exp((z - x) * (z + x) + R / S)
    r = np.exp(-x * x - 0.5625) * np.exp(R / S)
    return (one - r / x) * sign