QUES: As the degree of the polynomial increases the possible number of turning points increases

correct the punctuation.

CORRECTED: As the degree of the polynomial increases the possible number of turning points increases.

QUES: The time you spend on entertainment is valuable and should captivate you regardless of whether you are in the mood for reflection or just pure pleasure

correct the punctuation.

CORRECTED: The time you spend on entertainment is valuable and should captivate you, regardless of whether you are in the mood for reflection or just pure pleasure.

QUES: Also there are residences available in the towers

correct the punctuation.

CORRECTED:
Also, there are residences available in the towers.