Matlab Won't Derive Quad Integral

What are the limits to Matlab definite integration? I have tried symbolically as well as numerically to derive an integral but Matlab keeps returning " Warning: No Explicit Solution Can be Found".

I know there is a solution to this problem yet I cannot obtain one. Additionally, it will continue running even after outputting that statement.

Here is the code ( partial) :

f=((Z+z)/((Y-y)^2+(Z+z)^2))*((X/(sqrt((Y-y)^2+(Z+z)^2+X^2)))-((X-  l)/(sqrt((Y-y)^2+(Z+z)^2+(X-l)^2))));

Intf=int(int(int(int(f,y,-h/2,h/2),z,0,w),Y,-h/2,h/2),Z,b,b+w)

Any help would be greatly appreciated.

Thanks,

Paul