Equation Icon  ( mAmB (rhAB,u),r- 1-(rV hAB,r),r - 2ebDADBeb + rhAC DB(U C) 2r r ,r r3 - 2b C D r- C - 2 e hAC hBD U ,r U,r + 2DA UB + 2 hAB,r DC U ) +rU CDC (hAB,r) + rhAD,r hCD(DBUC - DC UB) = 0. (25)