Complex sentence: One expedition under Pierre Louis Maupertuis (1736-37) was sent to Lapland (as far North as possible), the other under Pierre Bouguer was sent to Peru, near the equator (1735-44).
Split into simpler sentences: One expedition under Pierre Louis Maupertuis (1736-37) was sent to Lapland (as far North as possible). The second misstion under Pierre Bouguer was sent to Peru, near the equator (1735-44).