2 3 1
34 3/10 + 12 3/7 - 7 1/3 * 4 3/7 = 14 59/84
1) 7 1/3 * 4 3/7 = 22/3 * 31/7 = 682/21 = 32 10/21
2) 34 3/4 + 12 3/7 = 139/4 + 87/7 = 973/28+ 348/28 =1321/28 = 47 5/28
3) 47 5/28 - 32 10/21 = (47-32)+(5/28-10/21)= 15+(105/588 - 280/588) =
= 15 - 175/588 = 14 413/588 = 14 59/84