2009-11-07 06:16:55 +08:00
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\documentstyle[12pt]{article}
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\begin{document}
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\begin{eqnarray}
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2013-04-17 02:29:37 +08:00
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E &=& \epsilon \left[ \frac{\sigma^{6}}{7560}
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2010-10-22 23:23:51 +08:00
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\left(\frac{6R-D}{D^{7}} + \frac{D+8R}{(D+2R)^{7}} \right) -
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2009-11-07 06:16:55 +08:00
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\frac{}{} \right. \nonumber \\
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&&\qquad \left. \frac{1}{6} \left(\frac{2R(D+R) + D(D+2R)
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\left[ \ln D - \ln (D+2R) \right]}{D(D+2R)} \right) \right]
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\qquad r < r_c \nonumber
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\end{eqnarray}
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\end{document}
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