1/4 a^{}_{c0,a0,a1,a2} b^{a3,a4,v0,v1}_{} gamma1^{a2}_{a4} gamma1^{a1}_{a3} a+(c0) a+(a0) a-(v1) a-(v0)
+1/8 a^{}_{c0,a0,a1,a2} b^{a3,a4,v0,v1}_{} lambda2^{a1,a2}_{a3,a4} a+(c0) a+(a0) a-(v1) a-(v0)
+1/4 a^{}_{c0,a0,a1,a3} b^{a2,a4,v0,v1}_{} gamma1^{a3}_{a4} a+(c0) a+(a0) a+(a1) a-(v1) a-(v0) a-(a2)