Problem: Sign of expression

Problem

Find the sign of the following expressions for all \(x\)

1. \(x+2\)
2. \(x-2\)
3. \(2x+4\)
4. \(\left( x+2 \right)\left( x-2 \right)\)
5. \( \frac{x+2}{x-2}\)
6. \( \frac{x+2}{x-2}+1\)