diff --git a/man3/cexp.3 b/man3/cexp.3
index b83598a65..013a6d4d3 100644
--- a/man3/cexp.3
+++ b/man3/cexp.3
@@ -1,7 +1,7 @@
 .\" Copyright 2002 Walter Harms (walter.harms@informatik.uni-oldenburg.de)
 .\" Distributed under GPL
 .\"
-.TH CEXP 3 2002-07-28 "" "Linux Programmer's Manual"
+.TH CEXP 3 2007-12-26 "" "Linux Programmer's Manual"
 .SH NAME
 cexp, cexpf, cexpl \- complex exponential function
 .SH SYNOPSIS
@@ -16,9 +16,14 @@ cexp, cexpf, cexpl \- complex exponential function
 Link with \fI\-lm\fP.
 .SH DESCRIPTION
 The function calculates e (2.71828..., the base of natural logarithms)
-raised to the power of z.
+raised to the power of
+.BR z .
 .LP
-One has cexp(I * z) = ccos(z) + I * csin(z).
+One has:
+.nf
+
+    cexp(I * z) = ccos(z) + I * csin(z)
+.fi
 .SH "CONFORMING TO"
 C99
 .SH "SEE ALSO"
diff --git a/man3/cexp2.3 b/man3/cexp2.3
index 0d734d237..0645e7062 100644
--- a/man3/cexp2.3
+++ b/man3/cexp2.3
@@ -15,7 +15,8 @@ cexp2, cexp2f, cexp2l \- base-2 exponent of a complex number
 .sp
 Link with \fI\-lm\fP.
 .SH DESCRIPTION
-The function returns 2 raised to the power of z.
+The function returns 2 raised to the power of
+.IR z .
 .SH "CONFORMING TO"
 These function names are reserved for future use in C99.
 .SH AVAILABILITY
diff --git a/man3/clearenv.3 b/man3/clearenv.3
index 9928afa6e..5a0178e69 100644
--- a/man3/clearenv.3
+++ b/man3/clearenv.3
@@ -73,11 +73,11 @@ and rejected
 Used in security-conscious applications.
 If it is unavailable
 the assignment
-.RS
 .nf
+
     environ = NULL;
+
 .fi
-.RE
 will probably do.
 .LP
 The DG/UX and Tru64 man pages write: If