Simplify the rational expression: \[ \begin{array}{l} \frac{1}{x+p}+\frac{1}{x+q}+\frac{1}{x+r}+...

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Simplify the rational expression:
\[
\begin{array}{l}
\frac{1}{x+p}+\frac{1}{x+q}+\frac{1}{x+r}+\frac{p}{x^{2}+p x}+\frac{q}{x^{2}+q x} \\
+\frac{r}{x^{2}+r x}
\end{array}
\]
\( 49^{\prime} c^{4} \)
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