Question 1051567
<pre><b>
{{{(a/b + b/a)^2 -2}}}

{{{(a/b)^2+2(a/b)(b/a)+(b/a)^2-2}}}

{{{(a/b)^2+2(cross(a)/cross(b))(cross(b)/cross(a))+(b/a)^2-2}}}

{{{(a/b)^2+2+(b/a)^2-2}}}

{{{(a/b)^2+(b/a)^2}}}

{{{a^2/b^2+b^2/a^2}}}

You can leave it like that or get
the LCD and combine them:

{{{(a^4+b^4)/a^2b^2}}}

Edwin</pre></b>