عبارات مركّبة

\[\displaystyle \sqrt5^{-1}\left(\frac1{\sqrt5}+\sqrt5^{-3}\right)\]

\[\displaystyle (2\sqrt2-\sqrt7)^{153}(2\sqrt2+\sqrt7)^{154}\]

\[\displaystyle \left(\frac{5}{8}\right)^5\left(-\frac54\right)^{-5}\]