lst:=[[(a+b*arccos(c*x))^4,x,1],
[(a+b*arccos(c*x))^3,x,1],
[(a+b*arccos(c*x))^2,x,1],
[a+b*arccos(c*x),x,1],
[1/(a+b*arccos(c*x)),x,1],
[1/(a+b*arccos(c*x))^2,x,1],
[1/(a+b*arccos(c*x))^3,x,1],
[(a+b*arccos(c*x))^(5/2),x,1],
[(a+b*arccos(c*x))^(3/2),x,1],
[(a+b*arccos(c*x))^(1/2),x,1],
[1/(a+b*arccos(c*x))^(1/2),x,1],
[1/(a+b*arccos(c*x))^(3/2),x,1],
[1/(a+b*arccos(c*x))^(5/2),x,1],
[1/(a+b*arccos(c*x))^(7/2),x,1],
[(a+b*arccos(c*x))^n,x,1]]