1/4 a^{}_{a0,a1,a2,a3} b^{a4,a5,v1}_{v0} gamma1^{a3}_{a5} gamma1^{a2}_{a4} a+(a0) a+(a1) a+(v0) a-(v1)
+1/8 a^{}_{a0,a1,a2,a3} b^{a4,a5,v1}_{v0} lambda2^{a2,a3}_{a4,a5} a+(a0) a+(a1) a+(v0) a-(v1)
+1/6 a^{}_{a0,a1,a2,a4} b^{a3,a5,v1}_{v0} gamma1^{a4}_{a5} a+(a0) a+(a1) a+(a2) a+(v0) a-(v1) a-(a3)