-1/2 a^{c1,c2}_{c0,a0} b^{a2}_{c3} c^{c3,v0}_{a1,a3} eta1^{a3}_{a2} a+(c0) a+(a0) a+(a1) a-(v0) a-(c2) a-(c1)
+1/4 a^{c1,c2}_{c0,a2} b^{a3}_{c3} c^{c3,v0}_{a0,a1} gamma1^{a2}_{a3} a+(c0) a+(a0) a+(a1) a-(v0) a-(c2) a-(c1)
+1/2 a^{c0,c1}_{c3,a0} b^{a2}_{c2} c^{c3,v0}_{a1,a3} eta1^{a3}_{a2} a+(c2) a+(a0) a+(a1) a-(v0) a-(c1) a-(c0)
-1/4 a^{c0,c1}_{c3,a2} b^{a3}_{c2} c^{c3,v0}_{a0,a1} gamma1^{a2}_{a3} a+(c2) a+(a0) a+(a1) a-(v0) a-(c1) a-(c0)