4543.sagews

G = plot(prime_pi, 3, 50)
G += plot(Li, 3, 50, color='red')
G += plot(x/log(x), 3, 50, color='red')
G.show(frame=True, axes=False)

G = plot(prime_pi, 3, 200)
G += plot(Li, 3, 200, color='red')
G += plot(x/log(x), 3, 200, color='red')
G.show(frame=True, axes=False)