عبارات مركّبة

\[\displaystyle \sqrt{3^{-1}}\times\sqrt{21}-\frac{(\sqrt7)^{-2}}{(\sqrt7)^{-5}}\]

\[\displaystyle (-\sqrt2)^5+(\frac12)^2\times3(\sqrt3)^3-\frac14(\sqrt2+4(\sqrt3)^2)\]

\[\displaystyle \left[(-\sqrt5)^{-2}\right]^3\left[\frac{1}{2\sqrt5}^{-2}-(3\sqrt5)^2\right]\]

\[\displaystyle (\sqrt2)^4\times2^{-2}+(\sqrt2)^{-2}\times(\sqrt6)^2-3^{-3}\times(\sqrt3)^2\]

\[\displaystyle \left(\frac{2}{\sqrt3}\right)^{-2}\times3^{-1}\]