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