Integrate[cos\(40)x\(41)+Divide[sin\(40)tan\(40)cos\(40)x+3Power[x,2]\(41)\(41)\(41).,Sum[7Divide[Power[n,n],9Power[n,4]+\(40)6+n\(41)],{n,1,∞}]],{x,0,∞}]
Integrate[cos\(40)x\(41)+Divide[sin\(40)tan\(40)cos\(40)x+3Power[x,2]\(41)\(41)\(41).,Sum[7Divide[Power[n,n],9Power[n,4]+\(40)6+n\(41)],{n,1,∞}]],{x,0,∞}]