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