Tomamos como el límite
$$\lim_{x \to 0^+}\left(\frac{x^{4} + \left(x^{3} + x^{2}\right)}{x^{3} \left(x + 1\right)}\right)$$
cambiamos
$$\lim_{x \to 0^+}\left(\frac{x^{4} + \left(x^{3} + x^{2}\right)}{x^{3} \left(x + 1\right)}\right)$$
=
$$\lim_{x \to 0^+}\left(\frac{x^{2} \left(x^{2} + x + 1\right)}{x^{3} \left(x + 1\right)}\right)$$
=
$$\lim_{x \to 0^+}\left(\frac{x^{2} + x + 1}{x \left(x + 1\right)}\right) = $$
False
= oo
Entonces la respuesta definitiva es:
$$\lim_{x \to 0^+}\left(\frac{x^{4} + \left(x^{3} + x^{2}\right)}{x^{3} \left(x + 1\right)}\right) = \infty$$