triplequad problem

Hi all, I am new to matlab.I like to calculate the triple integral of a function,

x=sym('x');

y=sym('y');

t=sym('t');

w=sym('w');

fi2=(t(1.-2.0*t^2)^2(sqrt(t^2-0.25)))/(4.0*t^4(t^2-1.0)-(1.0-8.0(t^2-3.0*t^4+2.0*t^6));

j=besselj(0,(w*sqrt(2000.0/(1.125e7)))*t*sqrt(x*x+y*y));

F=@(t,x,y)fi2*j;

Q=triplequad(F,0.5,1.0,0,1.0,0,1.0)

and i am getting errors as

??? Error using ==> triplequad>innerintegral at 66 Inputs must be floats, namely single or double.

Error in ==> dblquad>innerintegral at 80 fcl = intfcn(xmin, y(1), varargin{:}); %evaluate only to get the class below

Error in ==> quad at 77 y = f(x, varargin{:});

Error in ==> dblquad at 60 Q = quadf(@innerintegral, ymin, ymax, tol, trace, intfcn, ...

Error in ==> triplequad at 53 Q = dblquad(@innerintegral, ymin, ymax, zmin, zmax, tol, quadf, intfcn, ...

Can some one suggest how to solve this? Thank you a lot.