Question

$sqrt[4]{81} - 64 frac{1}{3} +2 ^{2log_28}$

Answer 1

$sqrt[4]{81} - 64 frac{1}{3}+2^{2log_{2}8 }=3-64 frac{1}{3}+2^{log_{2}8^{2} }= \ -61 frac{1}{3} +8^{2}=64-61 frac{1}{3}=2 frac{2}{3}$