evalf(Int) works quite strangely for me

Question

evalf(Int(-(1/9)*exp(-n*(cos(phi)+sin(phi)))*cos(n*sin(phi))*cos(n*cos(phi))*n*(60*n+7*exp(2*n)-7*exp(-2*n))/(Pi^2*(exp(2*n)-exp(-2*n)+4*n)), [phi = 0 .. (1/2)*Pi, n = 0 .. inf]))

is leaving all the integral signs in result. What am I doing wrong?

Answer 1

You need to spell out the word infinity.