1.
27°28′36〃+2x(13°29′15〃-6°29′32〃)
=27°28′36〃+2x(6°59′43〃)
=27°28′36〃+13°59′26〃
= 41°28′2〃
2.
35°16′25″x4
=140°64′100″
=141°5′40″