I’m failing this class and i need a lot of ! it would be greatly appreciated!

What is the greatest common factor of 6a, 8a^{2}, and 14?

Find the measure of the interior angles of the following regular polygons: a triangle, a quadrilateral, a pentagon, an octagon, a decagon, a 30-gon, a 50-gon, and a 100-gon.

If you have the following equation, 2/3x+5/6-x=2-3/4x what would you multiply each term by to get rid of all the fractions