The expression shown in the image is:

$\frac{mn^9}{m^3}$

To simplify this expression:

1. Identify and simplify similar terms: Here, the variable $m$ appears in both the numerator and the denominator.
2. Apply the exponent rules: Specifically, use the rule $\frac{a^m}{a^n} = a^{m-n}$.

Let's simplify:

$\frac{mn^9}{m^3} = m^{1-3} \cdot n^9$

This simplifies to:

$m^{-2}n^9$

Alternatively, the simplified expression can be written as:

$\frac{n^9}{m^2}$

So, the simplified expression is $\frac{n^9}{m^2}$.

Would you like further details on this, or do you have any questions?

Here are 5 related questions:

1. How do you simplify $\frac{a^5b^3}{a^2b^2}$?
2. What is the simplified form of $\frac{c^7d}{c^2}$?
3. How would you handle the simplification of $\frac{p^4q^2}{p^4q^3}$?
4. How do you simplify expressions with negative exponents like $x^{-3}y^{-2}$?
5. What is the rule for multiplying exponents with the same base?

Tip: When simplifying expressions with exponents, always subtract the exponents when dividing terms with the same base.