... and only a few semesters of elementary schooling in his childhood, Banneker taught himself the algebra, geometry, logarithms, trigonometry, and astronomy needed to become an astronomer.
... at lamang ng ilang mga semesters ng elementarya-aaral sa kanyang pagkabata, Banneker nagtuturo siya mismo ang algebra, geometry, logarithms, trigonometrya, at astronomy, na kailangan upang maging isang astronomer.