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Fourier Integrals


I have the following solution to a Fourier Transform problem

2/Pi*Integrate[Cos[?]/?^2*(1 - Exp[-?^2*t])*Cos[?*x], {?, 0, ?}]

I need to plot it for t =0,1,2,3,4,5  and 0 < x< 5 in Mathematica, but 
the program can evaluate the integral

Is there a way to numerically get the program to plot it?? 



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