5 4/19 * 3 4/7 + 1 15/19 : 7/25 - 1 2/3 =

1. 5 4//19=99//19

2. 3 4//7=25//7

3. (99//19) * (25//7) = (2475//133)

4. 1 15//19=34//19

5. 7//25=0.28

6. (34//19) / 0.28 = (850//133)

7. (2475//133) + (850//133) = 25

8. 1 2//3=5//3

9. 25 - (5//3) = (70//3)