\[\frac{25^{4} \cdot 125^{10}}{5^{37}} = \frac{\left( 5^{2} \right)^{4} \cdot \left( 5^{3} \right)^{10}}{5^{37}} =\]
\[= \frac{5^{8} \cdot 5^{30}}{5^{37}} = \frac{5^{38}}{5^{37}} = 5\]