#
# 2.1   Exact arithmetic and basic functions
#
#
#
# MAPLE SESSION 1
#
>   2/3 + 3/5;
>   7 - 11/15;
>   12^20;
#
# 2.2   Floating-point arithmetic
#
#
#
# MAPLE SESSION 2
#
>   tan(Pi/5);           
>   evalf(%);
#
#
# MAPLE SESSION 3
#
>    E := exp(1); 
>    evalf(E,20);
>    Digits := 30;
>    evalf(E);
#
#
# MAPLE SESSION 4
#
>    E := exp(1); 
>    R0 := evalf(E,20);
#
#
# MAPLE SESSION 5
#
>   Digits := 10:
>   evalf(sin(Pi/6));
>   convert(%,rational);