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