1/4 a^{a1}_{a0} b^{c0,a2}_{v0,v1} c^{c2,c3}_{c1,a3} eta1^{a3}_{a1} gamma1^{a0}_{a2} a+(c1) a+(v0) a+(v1) a-(c3) a-(c2) a-(c0)
+1/4 a^{a1}_{a0} b^{c0,a2}_{v0,v1} c^{c2,c3}_{c1,a3} lambda2^{a0,a3}_{a1,a2} a+(c1) a+(v0) a+(v1) a-(c3) a-(c2) a-(c0)