-1/12 a^{}_{a0,a1,a2,a4} b^{a6,a7}_{a3,a5} lambda2^{a4,a5}_{a6,a7} a+(a0) a+(a1) a+(a2) a+(a3)
+1/12 a^{}_{a0,a1,a2,a6} b^{a5,a7}_{a3,a4} gamma1^{a6}_{a7} a+(a0) a+(a1) a+(a2) a+(a3) a+(a4) a-(a5)
+1/8 a^{}_{a0,a1,a4,a5} b^{a6,a7}_{a2,a3} gamma1^{a5}_{a7} gamma1^{a4}_{a6} a+(a0) a+(a1) a+(a2) a+(a3)
+1/16 a^{}_{a0,a1,a4,a5} b^{a6,a7}_{a2,a3} lambda2^{a4,a5}_{a6,a7} a+(a0) a+(a1) a+(a2) a+(a3)