(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
(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