-1/2 a^{a1}_{v0} b^{c0,a3}_{a0,a2} c^{c2,c3}_{c1,a4} eta1^{a4}_{a3} eta1^{a2}_{a1} a+(c1) a+(a0) a+(v0) a-(c3) a-(c2) a-(c0)
-1/2 a^{a1}_{v0} b^{c0,a3}_{a0,a2} c^{c2,c3}_{c1,a4} lambda2^{a2,a4}_{a1,a3} a+(c1) a+(a0) a+(v0) a-(c3) a-(c2) a-(c0)
-1/4 a^{a1}_{v0} b^{c0,a4}_{a2,a3} c^{c2,c3}_{c1,a0} lambda2^{a2,a3}_{a1,a4} a+(c1) a+(a0) a+(v0) a-(c3) a-(c2) a-(c0)