Question 1039632
This will not render:
[sqrt(2 )+1]^2 + [sqrt(2)-1]^2


Now this will render:
(sqrt(2)+1)^2+(sqrt(2)-1))^2


The triple curly brackets are needed:
{{{(sqrt(2)+1)^2+(sqrt(2)-1))^2}}}


Use the number properties you know.
{{{2+2sqrt(2)+1+2-2sqrt(2)+1}}}
{{{2+2+0+1+1}}}
{{{highlight(6)}}}