It evaluates to floating-point or complex floating-point numbers expressions (or subexpressions) involving constants such as Pi, exp(1), gamma, and functions such as exp, ln, sin, arctan, cosh, GAMMA, and erf. For the complete list of known constants, see ininames. For the complete list of known functions, see inifcns.

Try the following input samples:
 

• 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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