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