Найди значение выражения: 4 5\14 + (5 1/12 - 3 4/21)

4 5/14 + (5 1/12 - 3 4/21) = 5 1/4
1) 5 1/12 - 4 4/21 = 5 7/84 - 4 16/84 = 427/84 - 352/84 = 75/84
2) 4 5/14 + 75/84 = 4 30/84 + 75/84 = 4 105/84 = 5 21/84 = 5 3/12 = 5 1/4

45/14+(51/12-34/21)=45/14+(355-136)/84=45/14+219/84=(225+219)/84=444/8=55(1/2)