To rewrite the expression \( (14^{10})^4 \) as a single power of 14, we can use the property of exponents that states \( (a^m)^n = a^{m \cdot n} \).
Applying this property:
\[ (14^{10})^4 = 14^{10 \cdot 4} = 14^{40} \]
So the expression \( (14^{10})^4 \) rewritten as a single power is:
\[ 14^{40} \]