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