diff --git a/example11.html b/example11.html
index 8ce3ac9..f370ef9 100644
--- a/example11.html
+++ b/example11.html
@@ -72,10 +72,10 @@ The previous equation is simply included in the Markdown code part as some basic
 
 From the [GitHub issue #9](https://github.com/Naereen/StrapDown.js/issues/9)
 
-- \`@(1/2[1-(1/2)^n])/(1-(1/2))=s_n@\`
-- \`oint_Cx^3 dx+4y^2 dy\`
-- \`2=(((3-x)xx2)/(3-x))\`
-- \`sum_(m=1)^oosum_(n=1)^oo(m^2 n)/(3^m(m3^n+n3^m)\`
+- \`@(1/2[1-(1/2)^n])/(1-(1/2))=s_n@\` (works)
+- \`oint\_Cx^3 dx+4y^2 dy\` (works)
+- \`2=(((3-x)xx2)/(3-x))\` (works)
+- \`sum\_(m=1)^(oo) sum\_(n=1)^(oo) (m^2 n)/(3^m (m 3^n + n 3^m)\` (fails if \_ are not escaped with a backslash \\)
 
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