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