-1/2 a^{a0}_{a1} b^{a2,a3}_{v0,v1} c^{v2}_{a4} eta1^{a4}_{a3} gamma1^{a1}_{a2} a+(v0) a+(v1) a-(v2) a-(a0)
+1/4 a^{a0}_{a1} b^{a2,a3}_{v0,v1} c^{v2}_{a4} lambda2^{a1,a4}_{a2,a3} a+(v0) a+(v1) a-(v2) a-(a0)
-1/2 a^{a2}_{a1} b^{a0,a3}_{v0,v1} c^{v2}_{a4} eta1^{a4}_{a2} gamma1^{a1}_{a3} a+(v0) a+(v1) a-(v2) a-(a0)
-1/2 a^{a2}_{a1} b^{a0,a3}_{v0,v1} c^{v2}_{a4} lambda2^{a1,a4}_{a2,a3} a+(v0) a+(v1) a-(v2) a-(a0)