( 0.25 )3 * 32
= 0.25 * 4 * 0.25 * 4 * 0.25 * 2
= 1 * 1 * 0.5
= 0.5
( -0.125 ) 3 * 80
= -0.15625
\(\frac{8^2\cdot4^5}{2^{20}}=\frac{2^6\cdot2^{10}}{2^{20}}=\frac{1}{2^4}=\frac{1}{16}\)
\(\frac{81^{11}\cdot3^{17}}{27^{10}\cdot9^{15}}=\frac{3^{44}\cdot3^{17}}{3^{30}\cdot3^{30}}=3\)