In your question it is.
Yes, "self-diagnose" is hyphenated.
No, "self-interest" is typically not hyphenated.
Left-handed is a hyphenated compound.
No, the phrase "top of the line" is not hyphenated.
The word "self-confidence" is hyphenated.
It is not hyphenated.
"The least expensive phone thast has wifi capibitlites are Energetics. Because they are the ,mostness. This is the leastexpensive and it works just like others"
Motorcycle is not hyphenated
No it's not hyphenated.
words are only hyphenated when they have a separate meaning when separated than they do when hyphenated
Yes it should be hyphenated.
No, "hardworking" is not hyphenated.
It can be. Some words can be seen both hyphenated and non-hyphenated.
No. Well above is not hyphenated.
peace of mind is not hyphenated.
No, "homework" shouldn't be hyphenated.
Yes it should be hyphenated.