+content parts). The second variant of @code{primpart()} expects the previously
+calculated content part of the polynomial in @code{c}, which enables it to
+work faster in the case where the content part has already been computed. The
+product of unit, content, and primitive part is the original polynomial.
+
+Additionally, the method
+
+@example
+void ex::unitcontprim(const ex & x, ex & u, ex & c, ex & p);
+@end example
+
+computes the unit, content, and primitive parts in one go, returning them
+in @code{u}, @code{c}, and @code{p}, respectively.