from pylab import *
x = arange(-20, 20, .02)
y = x /(4 * x * 2 + 2 * x - 1)
grid()
import numpy as np
import matplotlib.pyplot as plt
y = lambda x: x/((4*x)**2+(2*x)-1)
xs = np.linspace(0, 10, 200)
plt.plot(xs, [y(x) for x in xs])
plt.show()
CmZyb20gcHlsYWIgaW1wb3J0ICoKIAp4ID0gYXJhbmdlKC0yMCwgMjAsIC4wMikKeSA9IHggLyg0ICogeCAqIDIgKyAyICogeCAtIDEpCmdyaWQoKQppbXBvcnQgbnVtcHkgYXMgbnAKaW1wb3J0IG1hdHBsb3RsaWIucHlwbG90IGFzIHBsdAogCnkgPSBsYW1iZGEgeDogeC8oKDQqeCkqKjIrKDIqeCktMSkKeHMgPSBucC5saW5zcGFjZSgwLCAxMCwgMjAwKQpwbHQucGxvdCh4cywgW3koeCkgZm9yIHggaW4geHNdKQpwbHQuc2hvdygp