Very Easy, Put you left locator at the beginning and Right at the end of The longest Audio tracks Length. Then you Create a New Stereo track, Select it, and go up to File or On the Mixing window, it says Export, Then you select Audio File. Then You have to make sure the sampling rate is set at 44.1kHz. and 16-bit. make sre all effects, and Automations are Checked to be put in Mixdown.You'll also want to pic your format of audio(WAV, AIF,SDII, MP3)
Then just burn it to CD