import matplotlib.pyplot as plt
from numpy import pi, exp, real, imag, linspace

def f(t):
	return exp(1j*t) - exp(6j*t)/2 + 1j*exp(-14j*t)/3

t = linspace(0, 2*pi, 1000)

plt.plot(real(f(t)), imag(f(t)))

# These two lines make the aspect ratio square
fig = plt.gcf()
fig.gca().set_aspect('equal')

plt.show()