-a^{c0,a2}_{a0,a1} b^{c1,a4}_{a3,v0} c^{v1}_{c2} eta1^{a3}_{a2} gamma1^{a1}_{a4} a+(c2) a+(a0) a+(v0) a-(v1) a-(c1) a-(c0)
-a^{c0,a2}_{a0,a1} b^{c1,a4}_{a3,v0} c^{v1}_{c2} lambda2^{a1,a3}_{a2,a4} a+(c2) a+(a0) a+(v0) a-(v1) a-(c1) a-(c0)
-1/2 a^{c0,a3}_{a1,a2} b^{c1,a4}_{a0,v0} c^{v1}_{c2} lambda2^{a1,a2}_{a3,a4} a+(c2) a+(a0) a+(v0) a-(v1) a-(c1) a-(c0)