a^{a0,a2}_{a1,v0} b^{c0,v2}_{a3,v1} c^{a4}_{c1} eta1^{a3}_{a2} gamma1^{a1}_{a4} a+(c1) a+(v0) a+(v1) a-(v2) a-(a0) a-(c0)
+a^{a0,a2}_{a1,v0} b^{c0,v2}_{a3,v1} c^{a4}_{c1} lambda2^{a1,a3}_{a2,a4} a+(c1) a+(v0) a+(v1) a-(v2) a-(a0) a-(c0)
+1/2 a^{a2,a3}_{a1,v0} b^{c0,v2}_{a4,v1} c^{a0}_{c1} lambda2^{a1,a4}_{a2,a3} a+(c1) a+(v0) a+(v1) a-(v2) a-(a0) a-(c0)