Question
Solve the following:
$4, 53, 678 + 2, 34, 876 - 1, 23, 456$
$4, 53, 678 + 2, 34, 876 - 1, 23, 456$
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| h | min | s | |
| $20$ | $30$ | $15$ | |
| $+$ | $14$ | $00$ | $10$ |