Please capitalize where necessary: usually the roots were gathered underwater from the shoals of the island by the women of the tribe.
A: Usually the roots were gathered underwater from the shoals of the island by the women of the tribe.

Q: before you can open a q3x file, you'll need to figure out what kind of file the q3x file extension refers to.

A: Before you can open a Q3X file, you'll need to figure out what kind of file the Q3X file extension refers to.

Q: revision 2.2.4 1645 downloads, released on 2011-08-15
A: Revision 2.2.4 1645 Downloads, Released on 2011-08-15

Problem: where w is paper width, l is paper length, t paper thickness, m number of folds in the width direction, and n the number of folds in the length direction.
Can you repeat this sentence, but capitalize it?
Answer: where W is paper width, L is paper length, t paper thickness, m number of folds in the width direction, and n the number of folds in the length direction.

Text: so i'm a functional leader of the visual area in the aforementioned countries.

Correct capitalization: So I'm a functional leader of the visual area in the aforementioned countries.

Text: and you can already try to see if it suits you!

Correct capitalization:
And you can already try to see if it suits you!