equation icon  ab c'd' N [G] = g g N[a(bc'd'[G] ) ( ) ] 2 1- p' 2 1- ' p = -3 G q m + 2 qR G;p' + m + 2qR G;p 2( ) ( ) ( ) + 9q-- G 'p'G p + G G p 'p' + m2 + 1qR m2 + 1-qR' G2 2 ;p ;p ;p p 2 2 (1 ) [ (1 ) ' ( ' ') +3 --- q 3 --- q G;p'pG;p p- 3q G;p G;p'pp + G;p'G;ppp 6 ( 6 ) ( ) ] 2 1 p' 2 1 ' ;p + m + -qR G;p'G; + m + --qR G;p G . (73) 2 2