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