graphics(
    line_real_imag(e3, label="e3", real=False,
        detect_poles="symbolic", modules="mpmath"),
    line_real_imag(e4, label="e4", real=False,
        detect_poles="symbolic", modules="mpmath"),
    ylim=(-5, 5))
# Expected:
## Plot object containing:
## [0]: cartesian line: im((1/x)**(6/5)) for x over (-10.0, 10.0)
## [1]: cartesian line: im(x**(-6/5)) for x over (-10.0, 10.0)