3 1/3×2 2/5×2/1-4 8/15×3/17

  а а а а а а  а равно 15.2
(((3  1/3) * (2 2/5)* 2) / 1)-(((4 8/15)* 3) / 17 равно 15.2

3 1/3 * 2 2/5 * 2/1 - 4 8/15 * 3/17 = 10/9 * 12/5 * 2/1 - 68/15 * 3/17 = 8/3 * 2/1 - 4/5 = 16/3 - 4/5 = (80-12)/15 = 68/15 = 4 8/15