2d 15Rewrite d^ 2d3d #2d3dformula. 2D (15-5-2d-15 as left (d^ 2d3d #2d3dformula. 2D (15-5-5drht)+left (3d-15rht). Factor out d in the first and 3 in the second group. Factor out common term d-5 by using distributive property. All equations of2d3d #2d3dformula. 2D (15-5