-1/4 a^{a1}_{a0} b^{c1,c2}_{c0,v0} c^{a4,v1}_{a2,a3} lambda2^{a2,a3}_{a1,a4} a+(c0) a+(a0) a+(v0) a-(v1) a-(c2) a-(c1)
+1/2 a^{a2}_{a1} b^{c1,c2}_{c0,v0} c^{a4,v1}_{a0,a3} eta1^{a3}_{a2} gamma1^{a1}_{a4} a+(c0) a+(a0) a+(v0) a-(v1) a-(c2) a-(c1)
+1/2 a^{a2}_{a1} b^{c1,c2}_{c0,v0} c^{a4,v1}_{a0,a3} lambda2^{a1,a3}_{a2,a4} a+(c0) a+(a0) a+(v0) a-(v1) a-(c2) a-(c1)