Pencasts will be linked below, with the newest Pencasts being toward the top of the page. Download the Pencast PDF, then click on the Livescribe.com site in the PDF itself. Then drag the PDF to the box requested. (As of July, 2018, this worked on Chrome, Safari and Firefox browsers, and was smoothest on Firefox.) Then you can hear audio of the solutions as well as see the solutions! You can also download the Livescribe + App to look at the Pencasts on your Android or iOS mobile device. If this technology stops working, I'll screencast my answers with explanations and upload them as video links.