Here is an example of a Risa/Asir session. In this example, Z contains two operators which annihilate 1F1(y1,y1,y1,y4,y4).
[1] Z=bload("/users/noro/desktop/5-3_2")$
[2] Z[0];
[[[[1,[]]],dy4^3],[[[2,[[y1-y4,1]]],[2,[[y4,1]]]],dy4*dy1],[[[-9/2,[[y1-y4,1]]],[3*c-11/2,[[y4,1]]],[-3,[]]],dy4^2],[[[-3,[[y1-y4,2]]],[2*c-8,[[y1-y4,1],[y4,1]]],[-2,[[y1-y4,1]]],[2*c-5,[[y4,2]]],[-2,[[y4,1]]]],dy1],[[[9/2,[[y1-y4,2]]],[-6*c+12,[[y1-y4,1],[y4,1]]],[6,[[y1-y4,1]]],
[2*c^2-8*c+15/2,[[y4,2]]],[-4*a-4*c+8,[[y4,1]]],[2,[]]],dy4],[[[6*a,[[y1-y4,1],[y4,1]]],[(-4*c+10)*a,[[y4,2]]],[4*a,[[y4,1]]]],1]]
[3] Z[1];
[[[[1,[]]],dy1^4],[[[6,[[y1-y4,1]]],[6*c-10,[[y1,1]]],[-6,[]]],dy1^3],[[[-5,[[y1-y4,1]]],[5,[[y1,1]]]],dy4*dy1^2],[[[12,[[y1-y4,2]]],[22*c-40,[[y1-y4,1],[y1,1]]],[-22,[[y1-y4,1]]],[11*c^2-39*c+32,[[y1,2]]],[-10*a-22*c+40,[[y1,1]]],[11,[]]],dy1^2],[[[-16,[[y1-y4,2]]],[-15*c+48,[[y1
-y4,1],[y1,1]]],[15,[[y1-y4,1]]],[15*c-32,[[y1,2]]],[-15,[[y1,1]]]],dy4*dy1],[[[9/4,[[y1-y4,2]]],[-9/2,[[y1-y4,1],[y1,1]]],[9/4,[[y1,2]]]],dy4^2],[[[15/2,[[y1-y4,3]]],[20*c-79/2,[[y1-y4,2],[y1,1]]],[-20,[[y1-y4,2]]],[18*c^2-70*c+64,[[y1-y4,1],[y1,2]]],[-30*a-36*c+72,[[y1-y4,1],[y1
,1]]],[18,[[y1-y4,1]]],[6*c^3-34*c^2+60*c-32,[[y1,3]]],[(-30*c+64)*a-18*c^2+70*c-64,[[y1,2]]],[30*a+18*c-36,[[y1,1]]],[-6,[]]],dy1],[[[-45/4,[[y1-y4,3]]],[-39/2*c+237/4,[[y1-y4,2],[y1,1]]],[39/2,[[y1-y4,2]]],[-9*c^2+123/2*c-96,[[y1-y4,1],[y1,2]]],[9*a+18*c-63,[[y1-y4,1],[y1,1]]],[
-9,[[y1-y4,1]]],[9*c^2-42*c+48,[[y1,3]]],[-9*a-18*c+87/2,[[y1,2]]],[9,[[y1,1]]]],dy4],[[[-21*a,[[y1-y4,2],[y1,1]]],[(-36*c+87)*a,[[y1-y4,1],[y1,2]]],[36*a,[[y1-y4,1],[y1,1]]],[(-18*c^2+84*c-96)*a,[[y1,3]]],[9*a^2+(36*c-87)*a,[[y1,2]]],[-18*a,[[y1,1]]]],1]]