JEE Main 16 March 2021 Shift 2 Solved Paper

Consider a rectangle ABCD having 5,7,6,9 points in the interior of the line segments AB, CD,BC,DA, respectively. Let α be the number of triangles having these points from different sides as vertices and β be the number of quadrilaterals having these points from different sides as vertices. Then, (β−α) is equal to