0,0081^{\frac{1}{4}}=\sqrt[4]{0,0081}=0,3
,
0,0001^{\frac{1}{2}}=\sqrt{0,0001}=0,01
100^{-\frac{3}{2}}=0,01^{\frac{3}{2}}=\sqrt{0,01^3}=0,1^3=0,001
,
log_2\sqrt{100}-log_2\sqrt{30}-log_2(\frac{1}{15})=
=log_2(\frac{\sqrt{100}}{\sqrt{30}}*\sqrt{15})=log_2\sqrt{50}