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RPL algebraic approach
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The above program takes 16.4 seconds to be executed on a HP-28S.
===Algebraic approach===
≪ 'n^2-(n-1)^2-1000'
EXPAN COLCT 'N' ISOL CEIL
≫ EVAL
which returns the same result in only 9.2 seconds.
=={{header|Sidef}}==
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