Adds infix expressions to perform arithmetic on the arguments of the LaTeX commands \setcounter, \addtocounter, \setlength, and \addtolength.

This package is part of the tools bundle in the LaTeX required distribution.

The authors are Kresten Krab Thorup and Frank Jensen. The package is Copyright © 1992-2007 Kresten Krab Thorup, Frank Jensen and the LaTeX Project.