1/2 a^{}_{c0,a0,a3,v0} b^{a1,a2,a4}_{c1} gamma1^{a3}_{a4} a+(c0) a+(c1) a+(a0) a+(v0) a-(a2) a-(a1)
-1/2 a^{}_{c0,a1,a2,v0} b^{a0,a3,a4}_{c1} gamma1^{a2}_{a4} gamma1^{a1}_{a3} a+(c0) a+(c1) a+(v0) a-(a0)
-1/4 a^{}_{c0,a1,a2,v0} b^{a0,a3,a4}_{c1} lambda2^{a1,a2}_{a3,a4} a+(c0) a+(c1) a+(v0) a-(a0)