How to change character to numerical and get time difference?

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天涯浪人
天涯浪人 2021-02-12 11:34

Below is the sample data and original data has more than 10k rows.

|time1|time2|time3|time4|
|01 02:52:12|01 03:00:25|01 03:08:09|01 03:35:20|
|13 15:58:57|13 17:         


        
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