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