-a^{v0,v1}_{c0,a0} b^{c2}_{c1} c^{a1}_{v1} gamma1^{a0}_{a1} a+(c0) a+(c1) a-(v0) a-(c2)
+a^{v0,v1}_{c1,a0} b^{c1}_{c0} c^{a1}_{v1} a+(c0) a+(a0) a-(v0) a-(a1)
-a^{v0,v1}_{c1,a0} b^{c1}_{c0} c^{a1}_{v1} gamma1^{a0}_{a1} a+(c0) a-(v0)
+1/2 a^{v0,v1}_{c1,a0} b^{c1}_{c0} c^{a1}_{v2} gamma1^{a0}_{a1} a+(c0) a+(v2) a-(v1) a-(v0)