1/2 a^{c1,a1}_{c0,a0} b^{v1,v2}_{c2,v0} c^{a3}_{a2} eta1^{a2}_{a1} gamma1^{a0}_{a3} a+(c0) a+(c2) a+(v0) a-(v2) a-(v1) a-(c1)
+1/2 a^{c1,a1}_{c0,a0} b^{v1,v2}_{c2,v0} c^{a3}_{a2} lambda2^{a0,a2}_{a1,a3} a+(c0) a+(c2) a+(v0) a-(v2) a-(v1) a-(c1)