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texmath-0.7: tests/writers/10.tex

\phi_{n}(\kappa) = \frac{1}{4\pi^{2}\kappa^{2}}\int_{0}^{\infty}\frac{\sin(\kappa R)}{\kappa R}\frac{\partial}{\partial R}\left\lbrack R^{2}\frac{\partial D_{n}(R)}{\partial R} \right\rbrack\, dR