Tell Whether or Not the Rational Expressions Are Equivalent $\frac{(3-m)(4-n)}{(m-3)(4+n)}, \frac{3-m}{m+3}$

True/False

Tell whether or not the rational expressions are equivalent.
- $\frac{(3-m)(4-n)}{(m-3)(4+n)}, \frac{3-m}{m+3}$