Решение:
Найдем производную функции $$y = -\frac{5}{6}x^3 - 3x^2 + x - 2$$:
\[ y' = \frac{d}{dx} \left( -\frac{5}{6}x^3 - 3x^2 + x - 2 \right) \]
\[ y' = -\frac{5}{6} \cdot 3x^2 - 3 \cdot 2x + 1 - 0 \]
\[ y' = -\frac{5}{2}x^2 - 6x + 1 \]
\[ y'(-2) = -\frac{5}{2}(-2)^2 - 6(-2) + 1 \]
\[ y'(-2) = -\frac{5}{2}(4) + 12 + 1 \]
\[ y'(-2) = -5 \cdot 2 + 13 \]
\[ y'(-2) = -10 + 13 \]
\[ y'(-2) = 3 \]
Ответ: 3