gradually, the art of making paper spread to the whole world.

How would the previous sentence be correctly capitalized?
Answer: Gradually, the art of making paper spread to the whole world.
the two tables of contents are shown to the left.

How would the previous sentence be correctly capitalized?
Answer: The two tables of contents are shown to the left.
the ordinary operations of algebra suffice to resolve problems in the theory of curves.

How would the previous sentence be correctly capitalized?
Answer: The ordinary operations of algebra suffice to resolve problems in the theory of curves.
samples were observed for surface morphology under a hitachi 4800 field emission scanning electron microscope at 3 kv.

How would the previous sentence be correctly capitalized?
Answer: Samples were observed for surface morphology under a Hitachi 4800 field emission scanning electron microscope at 3 kV.