Test: Exponents and Order of Operations. 1. What is 2 x 2 x 2 x 2 written in exponential form? 2. What is 3 x 3 x 3 x 3 written in exponential form? 3. What is 5 x 5 x 5 x 5 x 5 x 5 written in exponential form? 4. What is 7 x 7 x 7 x 7 written in exponential form?