1/2 a^{c0,a2}_{a0,a1} b^{a3}_{c1} c^{v1,v2}_{a4,v0} eta1^{a4}_{a2} gamma1^{a1}_{a3} a+(c1) a+(a0) a+(v0) a-(v2) a-(v1) a-(c0)
+1/2 a^{c0,a2}_{a0,a1} b^{a3}_{c1} c^{v1,v2}_{a4,v0} lambda2^{a1,a4}_{a2,a3} a+(c1) a+(a0) a+(v0) a-(v2) a-(v1) a-(c0)
+1/4 a^{c0,a3}_{a1,a2} b^{a4}_{c1} c^{v1,v2}_{a0,v0} lambda2^{a1,a2}_{a3,a4} a+(c1) a+(a0) a+(v0) a-(v2) a-(v1) a-(c0)