\[(x + y)^{4}\]
\[x = 0,7;y = 0,3:\]
\[(0,7 + 0,3)^{4} = 1^{4} = 1.\]
\[x = - 11;\ \ y = 6:\]
\[( - 11 + 6)^{4} = ( - 5)^{4} = 5^{4} =\]
\[= \left( 5^{2} \right)^{2} = 25^{2} = 625.\]