Permutations and Combinations Part 2

Let ABC be a triangle. Consider four points p1,p2,p3,p4 on the side AB , five points p5,p6,p7,p8,p9 on the side BC, and four points p10,p11,p12,p13 on the side AC. None of these points is a vertex of the triangle ABC. Then the total number of pentagons, that can be formed by taking all the vertices from the points p1,p2,...,p13, is ____