int(cos(6*pi*t)*e%5E(-pi*t%5E2)*cos(2*3*pi*t)%2Ct%2C-inf%2Cinf)

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.