6h 12 min 5 s + 1h 25 min 40s=

To add up the two time durations, let's first convert everything to seconds.

6 hours 12 minutes 5 seconds is equal to (6 * 3600) + (12 * 60) + 5 = 22325 seconds.

1 hour 25 minutes 40 seconds is equal to (1 * 3600) + (25 * 60) + 40 = 5140 seconds.

Now, we add these two durations together:

22325 seconds + 5140 seconds = 27465 seconds.

Now, we convert 27465 seconds back to hours, minutes, and seconds:

27465 seconds = 7 hours 37 minutes 45 seconds.

Therefore, 6 hours 12 minutes 5 seconds + 1 hour 25 minutes 40 seconds is equal to 7 часов 37 минут 45 секунд.