To write the given expression in exponential form, count the number of repeated factors and express them using an exponent.

The expression is:

$-10 \cdot (b + 4)(b + 4)(b + 4)(b + 4)(b + 4)$

Since $(b + 4)$ is repeated 5 times, we write it as $(b + 4)^5$. Thus, the expression in exponential form is:

$-10 \cdot (b + 4)^5$

Let me know if you'd like further clarifications!

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Related Questions:

1. How do you simplify expressions with exponents and coefficients?
2. What are the rules for multiplying exponential expressions?
3. How do you distribute a negative number through an expression like this?
4. Can this expression be further simplified for any specific values of $b$?
5. How do exponents affect equations when solving for variables?

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Tip:

When simplifying expressions with repeated factors, always double-check the number of repetitions to ensure the exponent is accurate.