Помогите срочно решить Даб 40 балов номер 31.5 нечетные только

1) (13 - 9)(13+9) = 4 * 22 = 883) (2,2 - 2,8)(2,2+2,8) = - 0,6 * 5 = - 35) (5/6 - 2/3)(5/6 + 2/3) = (5/6 - 4/6)(5/6 + 4/6) = 1/6 * 9/6 = 9/36 = 1/47) (5/12 - 3/4)(5/12 + 3/4) = (5/12 - 9/12)(5/12 + 9/12) = -4/12 * 14/12 = - 1/369) (8/15 - 4/5)(8/15 + 4/5) = (8/15 - 12/15)(8/15 + 12/15) = -4/15 * 20/15 = - 16/4511) (3 1/3 - 4 1/2)(3 1/3 + 4 1/2) = (10/3 - 9/2)(10/3 + 9/2) = (20/6 - 27/6)(20/6 + 27/6) = -7/6 * 47/6 = -322/36 = 8 17/1813) (51-41)(51+41) = 10 * 92 = 92015) (76-24)(76+24) = 52*100= 520017) (3 2/3 - 2 1/3)(3 2/3 + 2 1/3) = (11/3 - 7/3)(11/3 + 7/3) = 4/3*18/3 = 4/3 * 6 = 8