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