When using the Power () operator, adjust the relevant axis label

From SANS example, x-label on the subtracted datasets is 
<pre>
q [1/AA]
</pre>
It remains the same after application of Power operator to the 1st axis.
Ideally, this should instead be changed to something like 
<pre>
Power(q [1/AA], 2) or
( q [1/AA] )^2
</pre>

I believe this can be done by use of the label ifit macro
