a^{c0}_{v0} b^{c1,a2}_{a0,a1} c^{a4,v1}_{c2,a3} eta1^{a3}_{a2} gamma1^{a1}_{a4} a+(c2) a+(a0) a+(v0) a-(v1) a-(c1) a-(c0)
+a^{c0}_{v0} b^{c1,a2}_{a0,a1} c^{a4,v1}_{c2,a3} lambda2^{a1,a3}_{a2,a4} a+(c2) a+(a0) a+(v0) a-(v1) a-(c1) a-(c0)
+1/2 a^{c0}_{v0} b^{c1,a3}_{a1,a2} c^{a4,v1}_{c2,a0} lambda2^{a1,a2}_{a3,a4} a+(c2) a+(a0) a+(v0) a-(v1) a-(c1) a-(c0)