E_{Q} = \frac{1}{4 π ε_{0}} \frac{Q}{ε r^{2}} \frac{r}{| r |}

${{\bf E}_Q = \frac{1}{4\pi \varepsilon_0} \frac{Q}{\varepsilon r^2} \frac{{\bf r}}{|{\bf r}|}}$

Error