Text: once they accept, they will have the ability to edit links, post announcements, and delete comments.

Correct capitalization: Once they accept, they will have the ability to edit links, post announcements, and delete comments.

Text: a classic color that is always in step with the times and scientific research.

Correct capitalization: A classic color that is always in step with the times and scientific research.

Text: given the exchange rate e the price for tv's in the u.s. is then determined.

Correct capitalization: Given the exchange rate E the price for TV's in the U.S. is then determined.

Text: boron enhances the oestrogenic effect, and since the prevalence of osteoporosis in vegetarians is low, the effect might be caused by boron primarily being present in vegetable products.

Correct capitalization:
Boron enhances the oestrogenic effect, and since the prevalence of osteoporosis in vegetarians is low, the effect might be caused by boron primarily being present in vegetable products.