-1/2 a^{c0,a2}_{a0,a1} b^{v1,v2}_{c1,v0} c^{a3}_{v2} lambda2^{a0,a1}_{a2,a3} a+(c1) a+(v0) a-(v1) a-(c0)
+1/4 a^{c0,a2}_{a0,a1} b^{v1,v2}_{c1,v0} c^{a3}_{v3} lambda2^{a0,a1}_{a2,a3} a+(c1) a+(v0) a+(v3) a-(v2) a-(v1) a-(c0)
-a^{c0,a1}_{a0,a2} b^{v1,v2}_{c1,v0} c^{a3}_{v2} gamma1^{a2}_{a3} a+(c1) a+(a0) a+(v0) a-(v1) a-(a1) a-(c0)