-1/4 a^{v0,v1}_{c0,a1} b^{v3}_{v2} c^{a3,a4}_{a0,a2} lambda2^{a1,a2}_{a3,a4} a+(c0) a+(a0) a+(v2) a-(v3) a-(v1) a-(v0)
-1/2 a^{v0,v2}_{c0,a1} b^{v1}_{v2} c^{a3,a4}_{a0,a2} lambda2^{a1,a2}_{a3,a4} a+(c0) a+(a0) a-(v1) a-(v0)
+1/2 a^{v0,v2}_{c0,a3} b^{v1}_{v2} c^{a2,a4}_{a0,a1} gamma1^{a3}_{a4} a+(c0) a+(a0) a+(a1) a-(v1) a-(v0) a-(a2)