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