1/2 a^{v0}_{c0} b^{c2,v1}_{c1,a0} c^{a2,a3}_{c3,a1} lambda2^{a0,a1}_{a2,a3} a+(c0) a+(c1) a+(c3) a-(v1) a-(v0) a-(c2)
+1/2 a^{v0}_{c2} b^{c2,v1}_{c0,a0} c^{a2,a3}_{c1,a1} lambda2^{a0,a1}_{a2,a3} a+(c0) a+(c1) a-(v1) a-(v0)
-a^{v0}_{c2} b^{c2,v1}_{c0,a2} c^{a1,a3}_{c1,a0} gamma1^{a2}_{a3} a+(c0) a+(c1) a+(a0) a-(v1) a-(v0) a-(a1)