81−34^{-\frac{3}{4}}−43 x 2512^{\frac{1}{2}}21 x 24325^{\frac{2}{5}}52
= (814)−3×25×(2435)2(\sqrt[4]{81})^{-3} \times \sqrt{25} \times (\sqrt[5]{243})^{2}(481)−3×25×(5243)2
= 5×3233\frac{5 \times 3^{2}}{3^{3}}335×32
= 53\frac{5}{3}35
