1/4 a^{c1}_{c0} b^{v0,v1}_{c2,a0} c^{a1,a2}_{v0,v1} a+(c0) a+(c2) a+(a0) a-(a2) a-(a1) a-(c1)
+1/2 a^{c1}_{c0} b^{v0,v1}_{c2,a1} c^{a0,a2}_{v0,v1} gamma1^{a1}_{a2} a+(c0) a+(c2) a-(a0) a-(c1)
-a^{c1}_{c0} b^{v0,v2}_{c2,a1} c^{a0,a2}_{v1,v2} gamma1^{a1}_{a2} a+(c0) a+(c2) a+(v1) a-(v0) a-(a0) a-(c1)