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