Examples for evaluation and Minpoly

Try the following examples:
 

• Evaluate  sqrt(2)+sqrt(3).

(Check whether it is algebraic. Try degree 4 and precision 20. What happens if you set degree 3? Why?)
 
• Evaluate  exp(Pi / 7 * I).

(Check whether it is algebraic. Try degree 6 and precision 50. What happens if you set degree 7? Why?)

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