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