Add punctuation: The best treatment of a tension headache is to learn to relax by a relaxation therapist or physiotherapist
A: The best treatment of a tension headache is to learn to relax by a relaxation therapist or physiotherapist.

Add punctuation: In this address he considered the answer to this question given by Venn and quoted that by De Morgan
A: In this address he considered the answer to this question given by Venn and quoted that by De Morgan :

Add punctuation: Not to mention the turquoise
A:
Not to mention the turquoise.