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