complaints do not entitle buyer to a price reduction or cancellation of the agreement.

How would the previous sentence be correctly capitalized?
Answer: Complaints do not entitle BUYER to a price reduction or cancellation of the agreement.
this applies in particular to areas such as customs, taxation, agriculture and fisheries.

How would the previous sentence be correctly capitalized?
Answer: This applies in particular to areas such as customs, taxation, agriculture and fisheries.
i asked burnside 's advice on topics of group theory which would be worth investigation and received a postcard in reply containing valuable suggestions as to worth-while problems.

How would the previous sentence be correctly capitalized?
Answer: I asked Burnside 's advice on topics of group theory which would be worth investigation and received a postcard in reply containing valuable suggestions as to worth-while problems.
additionally, three pieces of dictation equipment are included, a digital dictaphone, a foot pedal and a headset.

How would the previous sentence be correctly capitalized?
Answer: Additionally, three pieces of dictation equipment are included, a digital Dictaphone, a foot pedal and a headset.