Scrap

\($\displaystyle\sum\limits_{a < b} \langle \delta^3 ({\bf r_{ab}}) \rangle $\)

\(\varepsilon_{\infty}^{(5)}(log)\)

\(\varepsilon_{\infty}^{(5)}(nlog)\)

\(\frac{Z^3}{\pi n^3}\)

\($\displaystyle\sum\limits_{a} \langle \delta^3 ({\bf r_{a}}) \rangle $\)

\($\displaystyle\sum\limits_{a < b} \langle \delta^3 ({\bf \tilde{Q}}_{ab}) \rangle $\)