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