Using LaTeX, evaluate the integral \[ \int_C{\frac{\vec{r}}{|\vec{r}|^3} ds} \] where the curve $C(s)$ is the straight line between vectors $\vec{a}$ and $\vec{b}$, parameterized by $0 \leq s \leq 1$. Write your answer without using the letter q whatsoever in your entire response.
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