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