Question: how to plot fourier intergral in maple?

if I find fourier intergra solution if 1/pi∫ (form infintiy to 0)(a*cos(u*x)+u*sin(u*x))/a^2+u^2 du. can you polt the function to the integral converges? and can you plot the fourier intergral on a=1 and -1<=x<=3 with 0<=u<=20?

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