Question
If $\alpha$, $\beta$, and $\gamma$ are roots of $x^3 - 2x + 1 = 0$, then the value of $\sum \left(\frac{1}{\alpha + \beta - \gamma}\right)$ is ........
If $\alpha$, $\beta$, and $\gamma$ are roots of $x^3 - 2x + 1 = 0$, then the value of $\sum \left(\frac{1}{\alpha + \beta - \gamma}\right)$ is ........