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