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  • Normal[ expr ] converts expr to a normal expression, from a variety of special forms.
  • Normal[ expr ] converts a power series to a normal expression by truncating higher-order terms.
  • Normal[ expr ] converts RootSum objects into explicit sums involving Root objects.
  • When additional "data types" are introduced, Normal should be defined to convert them, when possible, to normal expressions.
  • See the Mathematica book: Section 1.5.9, Section 3.4.3Section 3.6.5.
  • See also: SeriesCoefficient.

    Further Examples

    Here is a plot of the cosine function along with its order polynomial approximation.

    Evaluate the cell to see the graphic.