2 2 {\displaystyle {\sqrt {2}}^{\sqrt {2}}}
( 2 2 ) 2 {\displaystyle \left({\sqrt {2}}^{\sqrt {2}}\right)^{\sqrt {2}}}
( 2 2 ) 2 = ( 2 ) 2 2 = ( 2 ) 2 = 2 {\displaystyle \left({\sqrt {2}}^{\sqrt {2}}\right)^{\sqrt {2}}=({\sqrt {2}})^{{\sqrt {2}}{\sqrt {2}}}=({\sqrt {2}})^{2}=2}
