equation icon  ( ) 2 1k2- 1- 2--e2d-- -4d 2-2 --e2d--- H y - HR - 3a2 R = - 6 k e2d- 1 dr + e dr- + 3k e2d - 1 rE N 1 [( ) ( )2 1k2 ] - ------- d - H N + d - H N - d2y + 2Hdy - dR - ----N . e2d - 1 3a2 (376)