175°16'39”-47°30’÷ 6+40°12‘50“×3

175°16'39”-47°30’÷ 6+40°12‘50“×3
=175°16'39”-42°330’÷ 6+120°36‘150“
=175°16'39”-7°55’+120°38‘30“
=175°16'39”+120°38‘30“-7°55’
=295°54'69”-7°55’
=295°55'9”-7°55’
=288°0'9”