Câu 2:
a: \(2^8\cdot4^6\cdot8^5=2^8\cdot2^{12}\cdot2^{15}=2^{35}\)
b: \(12^3:\left(3^{-4}\cdot64\right)=\dfrac{2^6\cdot3^3}{3^{-4}\cdot2^6}=3^{3+4}=3^7\)
c: \(=5^4\cdot5^3\cdot\dfrac{2^{-5}}{5^{-5}}\cdot\dfrac{1}{25}=\dfrac{1}{32}\cdot5^{14}=\dfrac{5^{14}}{32}\)