-1/2 a^{c0,a1}_{a0,v0} b^{a2,v1}_{c1,c2} c^{v2}_{a3} eta1^{a3}_{a1} gamma1^{a0}_{a2} a+(c1) a+(c2) a+(v0) a-(v2) a-(v1) a-(c0)
-1/2 a^{c0,a1}_{a0,v0} b^{a2,v1}_{c1,c2} c^{v2}_{a3} lambda2^{a0,a3}_{a1,a2} a+(c1) a+(c2) a+(v0) a-(v2) a-(v1) a-(c0)