Find the remainder when the polynomial $x^5 + x^4 + x^3 + x^2 + x$ is divided by $x^3-4x$.
from sympy import Symbol, Poly

x = Symbol('x')

n = x**5 + x**4 + x**3 + x**2 + x
d = x**3 - 4

remainder = n % d

print(remainder)