1/12 a^{}_{a0,a4,v0,v1} b^{a1,a2,a3,a5}_{} gamma1^{a4}_{a5} a+(a0) a+(v0) a+(v1) a-(a3) a-(a2) a-(a1)
+1/8 a^{}_{a2,a3,v0,v1} b^{a0,a1,a4,a5}_{} gamma1^{a3}_{a5} gamma1^{a2}_{a4} a+(v0) a+(v1) a-(a1) a-(a0)
+1/16 a^{}_{a2,a3,v0,v1} b^{a0,a1,a4,a5}_{} lambda2^{a2,a3}_{a4,a5} a+(v0) a+(v1) a-(a1) a-(a0)