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