Question 11$a , b$ are the distinct real roots of $x^{2} - 10 x + 2$. Find $\frac{1}{a^{3} + 2 a} + \frac{1}{b^{3} + 2 b}$.$1$$2$$\frac{1}{2}$$\frac{5}{12}$$\frac{12}{5}$