Найди значение вырадения (5 3/10 - 3 4/5 * 13/38) * 5/84 + 2 1/12 * 4/15

(5 3/10 - 3 4/5 * 13/38) * 5/84 + 2 1/12 * 4/15 =  50/63

1) 3 4/5 * 13/38 = 1 3/10

2) 5 3/10 - 1 3/10 = 4

3) 4 × 5/84 = 5/21

4) 2 1/12 * 4/15 = 5/9

5) 5/21 + 5/9 = 50/63