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