Precalc+1-3+Notes

media type="file" key="Precalc1-3NotesA.mov" width="669" height="669" media type="file" key="Precalc1-3NotesB.mov" width="669" height="669" media type="file" key="Precalc1-3NotesC.mov" width="670" height="670" media type="file" key="Precalc1-3NotesD.mov" width="674" height="674"