Integration of Bessel functions

I can't do it. Can you help me?

u=symunit;
deltar=0.646*u.m;
D_az=4*u.m;
R_az=D_az/2;
int(besselj(0,(2.405*r)/(R_az+deltar)),r,0,R_az)

Answer 1

[VBBV]

Define symbolic variables

 % if true
    % code
 % end
syms mu r ;
deltar=0.646*mu;
D_az=4*mu;
R_az=D_az/2;
int(besselj(0,(2.405*r)/(R_az+deltar)),r,0,R_az)

[Mehmet SARIARSLAN]

I forget add u. Sorry!

u=symunit;