1/4 a^{}_{a0,a1,a2,v0} b^{a3,a4,v1,v2}_{} gamma1^{a2}_{a4} gamma1^{a1}_{a3} a+(a0) a+(v0) a-(v2) a-(v1)
+1/8 a^{}_{a0,a1,a2,v0} b^{a3,a4,v1,v2}_{} lambda2^{a1,a2}_{a3,a4} a+(a0) a+(v0) a-(v2) a-(v1)
-1/4 a^{}_{a0,a1,a3,v0} b^{a2,a4,v1,v2}_{} gamma1^{a3}_{a4} a+(a0) a+(a1) a+(v0) a-(v2) a-(v1) a-(a2)