-1/2 a^{v1}_{c0,a1,v0} b^{a3,a4}_{a0,a2} lambda2^{a1,a2}_{a3,a4} a+(c0) a+(a0) a+(v0) a-(v1)
+1/2 a^{v1}_{c0,a3,v0} b^{a2,a4}_{a0,a1} gamma1^{a3}_{a4} a+(c0) a+(a0) a+(a1) a+(v0) a-(v1) a-(a2)