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