Could someone please help me with these problems

<font size = 4 color = "indigo"><b> 1.{{{sqrt(3/2)}}} {{{sqrt(3)/sqrt(2)}}} {{{(sqrt(3)/sqrt(2))(sqrt(2)/sqrt(2))}}} {{{sqrt(3*2)/sqrt(2*2)}}} {{{sqrt(6)/sqrt(4)}}} {{{sqrt(6)/2}}} 2.{{{4/sqrt(6)}}} {{{(4/sqrt(6))(sqrt(6)/sqrt(6))}}} {{{4sqrt(6)/sqrt(36)}}} {{{4sqrt(6)/6}}} {{{2sqrt(6)/3}}} 3.{{{(3+sqrt(2))/sqrt(b)}}} {{{( (3+sqrt(2))/sqrt(b) )(sqrt(b)/sqrt(b))}}} {{{((3+sqrt(2))sqrt(b))/sqrt(b^2)}}} {{{(3sqrt(b)+sqrt(2b))/b}}} 4. {{{(4sqrt(x))/(1+ 2sqrt(y))}}} {{{((4sqrt(x))/(1+ 2sqrt(y)))((1-2sqrt(y))/(1-2sqrt(y)))}}} {{{ (4sqrt(x)-8sqrt(xy))/(1-2sqrt(y)+2sqrt(y)-4sqrt(y^2))}}} {{{ (4sqrt(x)-8sqrt(xy))/(1-4y)}}} Edwin</pre>