Express as a power of the same base.

a) [[$ 1^4 \cdot 1^2 \cdot 1^5=$]]


b) [[$ 2^2 \cdot 2^3 =$]]


c) [[$ \left( \dfrac{1}{2} \right) ^6 \cdot \dfrac{1}{2} =$]]


d) [[$ 10^5 \cdot 10^4=$]]