Simplify and expand polynomials.

You can use numbers, fractions, and characters 'a', 'b', ... , 'z'.

Example of expressions :

You can use numbers, fractions, and characters 'a', 'b', ... , 'z'.

Example of expressions :

`2/3`

, `5^3`

, `2*x^3+1`

, `x*(x+1)*(x+2)^2`

, `(a+b)^5`

, `(a+b)*(x+y)+2*x*y+5/8`

The calculator didn't support functions or numbers like $\sqrt{2}, 5^{1/3}, \cdots$, but you can replace it with a variable, example :

If we need to compute $(x+\sqrt{2})^3$ we can compute $(x+a)^3$ and finally replace $a$ with $\sqrt{2}$.

If we need to compute $(x+\sqrt{2})^3$ we can compute $(x+a)^3$ and finally replace $a$ with $\sqrt{2}$.

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