a^{a0,a2}_{a1,v0} b^{a3}_{v1} c^{v2}_{a4} eta1^{a4}_{a2} gamma1^{a1}_{a3} a+(v0) a+(v1) a-(v2) a-(a0)
+a^{a0,a2}_{a1,v0} b^{a3}_{v1} c^{v2}_{a4} lambda2^{a1,a4}_{a2,a3} a+(v0) a+(v1) a-(v2) a-(a0)
+1/2 a^{a2,a3}_{a1,v0} b^{a0}_{v1} c^{v2}_{a4} lambda2^{a1,a4}_{a2,a3} a+(v0) a+(v1) a-(v2) a-(a0)