-1/2 a^{v0,v1}_{c0,c1} b^{c2}_{a1} c^{a0,a2}_{c3,v1} gamma1^{a1}_{a2} a+(c0) a+(c1) a+(c3) a-(v0) a-(a0) a-(c2)
-1/2 a^{v0,v1}_{c0,c2} b^{c2}_{a0} c^{a1,a2}_{c1,v1} a+(c0) a+(c1) a+(a0) a-(v0) a-(a2) a-(a1)
+a^{v0,v1}_{c0,c2} b^{c2}_{a1} c^{a0,a2}_{c1,v1} gamma1^{a1}_{a2} a+(c0) a+(c1) a-(v0) a-(a0)
-1/2 a^{v0,v1}_{c0,c2} b^{c2}_{a1} c^{a0,a2}_{c1,v2} gamma1^{a1}_{a2} a+(c0) a+(c1) a+(v2) a-(v1) a-(v0) a-(a0)