4*60+30+2*60+54=444 minute sau 26.640 secunde
2*60+3+7*60+58 (secundele la urma)=601 minute 49 s =36.060 s + 49 s = 36.109 s
21*60+20-17*60+37=230 minute=13.800 secunde
5*60+5=305min*60=18.300s+12s=18.312s;
18.312-(2*60*60)+12*60+30=18.312-7920=10.362 s