Question 36652
{{{ sqrt(50) + 2sqrt(32) - sqrt(8) }}} 
First thing is that you have to work out the roots.  Let's start with the 50.
{{{ sqrt(5*5*2) + 2sqrt(32) - sqrt(8) }}}
{{{ 5sqrt(2) + 2sqrt(32) - sqrt(8) }}}
Now the root of 32
{{{ 5sqrt(2) + 2sqrt(2*2*2*2*2) - sqrt(8) }}}
{{{ 5sqrt(2) + 8sqrt(2) - sqrt(8) }}}
now the root of 8
{{{ 5sqrt(2) + 8sqrt(2) - sqrt(2*2*2) }}}
{{{ 5sqrt(2) + 8sqrt(2) - 2sqrt(2) }}}
Now that all of the roots are the same, they are treated much like variables.
5 + 8 - 2 = 11
{{{ 11sqrt(2) }}}