Draw the graph of the function $y = \frac{| x^3 - x^2 - 2x | }{3} - | x + 1 |$.
To graph the function \( y = \frac{| x^3 - x^2 - 2x | }{3} - | x + 1 | \), we need to consider the absolute value expressions and break the function into different cases based on the critical points where the expressions inside the absolute values change sign.

1. **Rewrite the function:**
   \[
   y = \frac{|(x+1)(x-2)x|}{3} - |x+1|
   \]

2. **Identify critical points:**
   The critical points are \( x = -1 \), \( x = 0 \), and \( x = 2 \). These points divide the real line into four intervals: \( (-\infty, -1) \), \( [-1, 0] \), \( (0, 2) \), and \( [2, \infty) \).

3. **Case I: \( x < -1 \)**
   - For \( x < -1 \), both \( x+1 \) and \( x \) are negative, and \( x-2 \) is negative.
   - Therefore, \( |(x+1)(x-2)x| = -(x+1)(x-2)x \) and \( |x+1| = -(x+1) \).
   - The function becomes:
     \[
     y = \frac{-(x+1)(x-2)x}{3} + (x+1) = -\frac{(x+1)(x-2)x}{3} + (x+1)
     \]
   - Simplify:
     \[
     y = -\frac{(x+1)(x-2)x}{3} + (x+1) = -\frac{1}{3}(x^3 - x^2 - 2x) + (x+1)
     \]

4. **Case II: \( -1 \le x \le 0 \)**
   - For \( -1 \le x \le 0 \), \( x+1 \) is non-negative, \( x \) is non-positive, and \( x-2 \) is negative.
   - Therefore, \( |(x+1)(x-2)x| = (x+1)(x-2)x \) and \( |x+1| = x+1 \).
   - The function becomes:
     \[
     y = \frac{(x+1)(x-2)x}{3} - (x+1) = \frac{(x+1)(x-2)x}{3} - (x+1)
     \]
   - Simplify:
     \[
     y = \frac{1}{3}(x^3 - x^2 - 2x) - (x+1)
     \]

5. **Case III: \( 0 < x < 2 \)**
   - For \( 0 < x < 2 \), \( x+1 \) is positive, \( x \) is positive, and \( x-2 \) is negative.
   - Therefore, \( |(x+1)(x-2)x| = -(x+1)(x-2)x \) and \( |x+1| = x+1 \).
   - The function becomes:
     \[
     y = \frac{-(x+1)(x-2)x}{3} - (x+1) = -\frac{(x+1)(x-2)x}{3} - (x+1)
     \]
   - Simplify:
     \[
     y = -\frac{1}{3}(x^3 - x^2 - 2x) - (x+1)
     \]

6. **Case IV: \( x \ge 2 \)**
   - For \( x \ge 2 \), \( x+1 \) is positive, \( x \) is positive, and \( x-2 \) is non-negative.
   - Therefore, \( |(x+1)(x-2)x| = (x+1)(x-2)x \) and \( |x+1| = x+1 \).
   - The function becomes:
     \[
     y = \frac{(x+1)(x-2)x}{3} - (x+1) = \frac{(x+1)(x-2)x}{3} - (x+1)
     \]
   - Simplify:
     \[
     y = \frac{1}{3}(x^3 - x^2 - 2x) - (x+1)
     \]

By plotting these four cases, we can visualize the graph of the function \( y = \frac{| x^3 - x^2 - 2x | }{3} - | x + 1 | \).

The final answer is the graph of the function \( \boxed{ y = \frac{| x^3 - x^2 - 2x | }{3} - | x + 1 | } \).