Let $\omega \in \mathbb{C}$, and $\left |  \omega  \right | = 1$. Find the maximum length of $z = \left( \omega + 2 \right) ^3 \left( \omega - 3 \right)^2$.
1. Given $\omega \in \mathbb{C}$ with $|\omega| = 1$, we need to find the maximum length of $z = (\omega + 2)^3 (\omega - 3)^2$.
2. To simplify the problem, we consider the modulus of $z$, i.e., $|z| = |(\omega + 2)^3 (\omega - 3)^2| = |(\omega + 2)^3| \cdot |(\omega - 3)^2|$.
3. Since $|\omega| = 1$, we can write $\omega = e^{it}$ for some $t \in \mathbb{R}$.
4. We then have:
   \[
   |\omega + 2|^2 = |e^{it} + 2|^2 = (e^{it} + 2)(e^{-it} + 2) = 1 + 4\cos t + 4 = 5 + 4\cos t
   \]
   and
   \[
   |\omega - 3|^2 = |e^{it} - 3|^2 = (e^{it} - 3)(e^{-it} - 3) = 1 - 6\cos t + 9 = 10 - 6\cos t.
   \]
5. Therefore, we need to maximize the function:
   \[
   f(t) = (5 + 4\cos t)^3 (10 - 6\cos t)^2.
   \]
6. To find the maximum, we take the derivative of $f(t)$ with respect to $t$ and set it to zero:
   \[
   f'(t) = \frac{d}{dt} \left( (5 + 4\cos t)^3 (10 - 6\cos t)^2 \right).
   \]
7. Using the product rule and chain rule, we get:
   \[
   f'(t) = 3(5 + 4\cos t)^2 \cdot (-4\sin t) \cdot (10 - 6\cos t)^2 + (5 + 4\cos t)^3 \cdot 2(10 - 6\cos t) \cdot (-6\sin t).
   \]
8. Simplifying, we have:
   \[
   f'(t) = -12\sin t (5 + 4\cos t)^2 (10 - 6\cos t)^2 + (-12\sin t) (5 + 4\cos t)^3 (10 - 6\cos t).
   \]
9. Factoring out $-12\sin t$, we get:
   \[
   f'(t) = -12\sin t \left( (5 + 4\cos t)^2 (10 - 6\cos t)^2 + (5 + 4\cos t)^3 (10 - 6\cos t) \right).
   \]
10. Setting $f'(t) = 0$, we have:
    \[
    \sin t = 0 \quad \text{or} \quad (5 + 4\cos t)^2 (10 - 6\cos t)^2 + (5 + 4\cos t)^3 (10 - 6\cos t) = 0.
    \]
11. If $\sin t = 0$, then $t = 0$ or $t = \pi$. For these values, $\cos t = 1$ or $\cos t = -1$.
12. If $\cos t = 1$, then:
    \[
    |\omega + 2|^2 = 5 + 4 \cdot 1 = 9, \quad |\omega - 3|^2 = 10 - 6 \cdot 1 = 4.
    \]
    Thus,
    \[
    |(\omega + 2)^3 (\omega - 3)^2| = 9^{3/2} \cdot 4 = 27 \cdot 4 = 108.
    \]
13. If $\cos t = -1$, then:
    \[
    |\omega + 2|^2 = 5 + 4 \cdot (-1) = 1, \quad |\omega - 3|^2 = 10 - 6 \cdot (-1) = 16.
    \]
    Thus,
    \[
    |(\omega + 2)^3 (\omega - 3)^2| = 1^{3/2} \cdot 16 = 16.
    \]
14. If $\cos t = \frac{1}{2}$, then:
    \[
    |\omega + 2|^2 = 5 + 4 \cdot \frac{1}{2} = 7, \quad |\omega - 3|^2 = 10 - 6 \cdot \frac{1}{2} = 7.
    \]
    Thus,
    \[
    |(\omega + 2)^3 (\omega - 3)^2| = 7^{3/2} \cdot 7 = 7^{5/2} = 7^{2.5}.
    \]

The final answer is $\boxed{108}$.