Calculatii: b)37 grade - 43 minute -(24 grade 13 secunde+ 3 grade 45 minute 27 secunde) c)43 grade 15 secunde -(3 grade 29 minute 4 secunde + 15 grade 35 minute 56 secunde) d) 54 grade - (7 grade 49 minute 37 secunde+21 grade 34 minute 35 secunde)​