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