(%i1) 2^(log(x)/log(2)); (%o1) 2^(log(x)/log(2)) (%i2) radcan(%); (%o2) x On Thu, Sep 6, 2012 at 5:07 PM, Jean-Claude Arbaut < jeanclaudearbaut at orange.fr> wrote: > 2^(log(x)/log(2))