Simplify
1)
\(i^2\)
\(-1\)
2)
\(i^3\)
\(-i\)
3)
\(i^4\)
\(1\)
4)
\(i^5\)
\(i\)
5)
\(i^6\)
\(-1\)
6)
\(i^3 +2i^5\)
\(i\)
7)
\(3i^2 \times 4i^6\)
\(12\)
8)
\(\frac{7i^4 \times 4i^5}{14i}\)
\(4\)