28*derajat 19*menit 32*detik- 42*derajat 39*menit 47*detik

28⁰ 19' 32'' - 42⁰39' 47''= (28⁰ -42⁰ ) (19' - 39') (32'' - 47'')
= -14⁰ -20' -15''

cat :
 ⁰ => derajat
' => menit
'' => detik