-1/2 a^{c1,v0}_{c0,a0} b^{a1,v1}_{c2,c3} c^{a3}_{a2} eta1^{a2}_{a1} gamma1^{a0}_{a3} a+(c0) a+(c2) a+(c3) a-(v1) a-(v0) a-(c1)
-1/2 a^{c1,v0}_{c0,a0} b^{a1,v1}_{c2,c3} c^{a3}_{a2} lambda2^{a0,a2}_{a1,a3} a+(c0) a+(c2) a+(c3) a-(v1) a-(v0) a-(c1)