In space there is a planet called "Planet of Mathematics"

On this planet living expression, the expression of more complex the higher rank in society!

Here is traded on inshomu.Platyty for the goods had no money on hand to give a piece of paper on which was an expression product solves the take away does not solve anything we obtain not!

In this shop came easiest expression 2 + 2.He's not know mathematics food came and went to the cash register where he was given a hard expression .With expression he lost and returned empty-handed