52 minutes and 30 seconds + 27 minutes and 49 minutes + 4 hours and 13 minutes and 53 seconds equals

60seconds=1 minute

60 mins=1hour

add them

add seconds to seconds, minutes to minute, hous to hours,

first do seconds

sec

30+53=83=60+23=1 minute and 23 seconds

add this 1 minute to the minutes

min

1+52+27+49+13=142=60+60+22=1 hour + 1 hour+22 mins=2 hours+22 mins

add 2 to the hours

hours

2+4=6

6 hour

22 mins

23 seconds