-1/2 a^{a0,a2}_{a1,v0} b^{c0,c1}_{a3,v1} c^{a4}_{c2} eta1^{a3}_{a2} gamma1^{a1}_{a4} a+(c2) a+(v0) a+(v1) a-(a0) a-(c1) a-(c0)
-1/2 a^{a0,a2}_{a1,v0} b^{c0,c1}_{a3,v1} c^{a4}_{c2} lambda2^{a1,a3}_{a2,a4} a+(c2) a+(v0) a+(v1) a-(a0) a-(c1) a-(c0)
-1/4 a^{a2,a3}_{a1,v0} b^{c0,c1}_{a4,v1} c^{a0}_{c2} lambda2^{a1,a4}_{a2,a3} a+(c2) a+(v0) a+(v1) a-(a0) a-(c1) a-(c0)