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