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