Text: it may help men perform longer, make erections stronger, and improve a man's libido.

Correct capitalization: It may help men perform longer, make erections stronger, and improve a man's libido.

Text: more than representation of a form, chinese painting seeks to express the heart, the internal movement of the beings.

Correct capitalization: More than representation of a form, Chinese painting seeks to express the heart, the internal movement of the beings.

Text: check the following list of regions where cortana is available, and the corresponding language for each of those regions.

Correct capitalization: Check the following list of regions where Cortana is available, and the corresponding language for each of those regions.

Text: mounting: threaded stem, top plate or tube expander

Correct capitalization:
Mounting: Threaded stem, top plate or tube expander