1/8 a^{c0}_{a0} b^{v0,v1}_{c1,c2} c^{a1,a2}_{v0,v1} a+(c1) a+(c2) a+(a0) a-(a2) a-(a1) a-(c0)
+1/4 a^{c0}_{a1} b^{v0,v1}_{c1,c2} c^{a0,a2}_{v0,v1} gamma1^{a1}_{a2} a+(c1) a+(c2) a-(a0) a-(c0)
-1/2 a^{c0}_{a1} b^{v0,v2}_{c1,c2} c^{a0,a2}_{v1,v2} gamma1^{a1}_{a2} a+(c1) a+(c2) a+(v1) a-(v0) a-(a0) a-(c0)