64-28+47-55+34-45+64-46+19

Let's simplify the expression step by step:

1. \( 64 - 28 = 36 \)
2. \( 36 + 47 = 83 \)
3. \( 83 - 55 = 28 \)
4. \( 28 + 34 = 62 \)
5. \( 62 - 45 = 17 \)
6. \( 17 + 64 = 81 \)
7. \( 81 - 46 = 35 \)
8. \( 35 + 19 = 54 \)

So, the final result is \( 54 \).