-1/4 a^{a1}_{a0} b^{c0,a2}_{c1,c2} c^{c1,c2}_{v0,v1} a+(a0) a+(v0) a+(v1) a-(a2) a-(a1) a-(c0)
+1/2 a^{a0}_{a1} b^{c1,a2}_{c0,c3} c^{c2,c3}_{v0,v1} gamma1^{a1}_{a2} a+(c0) a+(v0) a+(v1) a-(a0) a-(c2) a-(c1)
-1/4 a^{a0}_{a1} b^{c0,a2}_{c1,c2} c^{c1,c2}_{v0,v1} gamma1^{a1}_{a2} a+(v0) a+(v1) a-(a0) a-(c0)