diff --git a/appdx-bips.asciidoc b/appdx-bips.asciidoc
index 01dd7e66..b08d277d 100644
--- a/appdx-bips.asciidoc
+++ b/appdx-bips.asciidoc
@@ -1,3 +1,4 @@
+[appendix]
 == Appendix - Bitcoin Improvement Proposals
 
 Bitcoin Improvement Proposals are design documents providing information to the Bitcoin community, or describing a new feature for Bitcoin or its processes or environment. 
diff --git a/appdx-pycoin.asciidoc b/appdx-pycoin.asciidoc
index 9a8f201d..c5834e7c 100644
--- a/appdx-pycoin.asciidoc
+++ b/appdx-pycoin.asciidoc
@@ -1,3 +1,4 @@
+[appendix]
 == Appendix - pycoin, ku and tx. 
 
 The Python library +pycoin+ (http://github.com/richardkiss/pycoin), originally written and maintained by Richard Kiss, is a Python-based library that supports manipulation of bitcoin keys and transactions, even supporting the scripting language enough to properly deal with non-standard transactions. 
diff --git a/appdx-scriptops.asciidoc b/appdx-scriptops.asciidoc
index 2ebe002d..ac851a2c 100644
--- a/appdx-scriptops.asciidoc
+++ b/appdx-scriptops.asciidoc
@@ -1,5 +1,5 @@
-
 [[tx_script_ops]]
+[appendix]
 == Appendix: Transaction Script Language Operators, Constants and Symbols
 
 [[tx_script_ops_table_pushdata]]
diff --git a/appdx-sx.asciidoc b/appdx-sx.asciidoc
index 3d6edfb2..efb07de3 100644
--- a/appdx-sx.asciidoc
+++ b/appdx-sx.asciidoc
@@ -1,4 +1,5 @@
 [[appdx_sx]]
+[appendix]
 == Appendix: Available commands with sx tools
 
 ----
diff --git a/appdx01.asciidoc b/appdx01.asciidoc
index 84112c53..378a2b67 100644
--- a/appdx01.asciidoc
+++ b/appdx01.asciidoc
@@ -1,7 +1,8 @@
+[[appdx01]]
 [appendix]
 == Appendix: Bitcoin financial services
 
-[[appdx01]]
+
 
 This appendix describes the main financial services offered in the bitcoin economy, comparing them to traditional financial services that are already familiar to consumers. It's not a list of sites or companies, as that would go stale immediately. Instead it is a list of service primitives with examples of existing implementations. For example, an escrow 
 service would be described as an archetype, by analogy to a real-estate escrow, showing the unique characteristics, use case and need for escrow in the bitcoin world. The escrow service archetype would be followed by two or three examples of well implemented actual escrow services, each demonstrating a capability unique to bitcoin.
diff --git a/ch04.asciidoc b/ch04.asciidoc
index 0e5046b6..fc657a0a 100644
--- a/ch04.asciidoc
+++ b/ch04.asciidoc
@@ -116,7 +116,7 @@ Bitcoin uses a specific elliptic curve and set of mathematical constants, as def
 [latexmath]
 ++++
 \begin{equation}
-{y^2 = (x^3 \+ 7)} \text{over} (\mathbb{F}_p)
+{y^2 = (x^3 + 7)} \text{over} (\mathbb{F}_p)
 \end{equation}
 ++++
 or