Express the following in exponential form:
1. \(2 \times 2 \times 2 \times 2 =\)
2. \(x \times x =\)
3. \(a \times a \times a \times a=\)
4. \(3 \times 3 \times 10 \times 10 \times 10 =\)
5. \(3 \times 3 \times a \times a=\)
6. \(a \times a \times a \times x \times x \times x \times x \times q =\)