Question: numerical intergration

Hi there,

 

I am trying to find the numerical value of the following integral:

 

evalf(int((T-a*n*(-T)^n+2*a*n^2*(-T)^n)/(T^2-a*T*(-T)^n+2*a*n^2*(-T)^n-2*a*n*(-T)^n), T = -90000 .. -29400)).

However, Maple just returns the integral. What am I doing wrong? 

 

Thanks!

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