The e2r or symb2poly command converts a symbolic polynomial into a list (for single variable polynomials) or a sum of monomials.
For one variable polynomials, this is optional and defaults to x.
| e2r(x^2-1) | 
or:
| symb2poly(x^2-1) | 
or:
| symb2poly(y^2-1,y) | 
or:
| e2r(y^2-1,y) | 
| 
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| e2r(x^2-x*y+y,[x,y]) | 
or:
| symb2poly(x^2-x*y+2*y,[x,y]) | 
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