Let's see:

y sigma x X ^ 

= unknown variable add/sum multiply unknown variable exponent/to the power.

= Uknown variable summed up multiplied by another unknown variable with power

= Unknown variable cross multiplied by another unknown variable with power.

= The sum of the powers of the unknown variables are great.

= Unknown variables crossed together unleash tremendous power.

= We cannot underestimate the power of the unknown.

= The unknown is unpredictable.

Dam your good and fast too lol. Thanks for the help.

I'm impressed too.  I'm going to put this one into our 'puzzles' sticky thread!

Thanks to both of you.