Assume that a, b, c, x and y represent real numbers. Write each

expression in exponential form

1. a∙a∙a∙a∙a∙ a

2. 5 ∙ x ∙ x ∙y ∙ y ∙y

3. −16 ∙ x ∙y∙ y ∙y ∙y

4. (−2 ∙ a ∙ b ∙ b ∙ b) − (5 ∙ c ∙ c ∙ c ∙ c)

5. (x + y) ∙ (x + y)∙ (x + y)​