The W3C browser is getting confused by the slash character, and takes the closing delimiter ‘+>+ for a content. So use, for instance, <br></br> instead of \verb�br /�+.
See end of http://www.w3.org/TR/CSS21/aural.htm. We provide values also for some unsupported attribute, with the expectation that at some point they’ll be supported.
In equation 3, the left parenthsis does not get spoken (The parentheses around the product: “( product under script j = 1 over script n end scripts x circumflex subscript j baseline )”. They should be spoken automatically by emacspeak, but the problem is that the punctuation mode for HTML is hardcoded to “some”, which means that not all punctuation codes will be spoken. Convert ( and ) into “left parenthesis” (or “enlarged left parenthesis”) and “right parenthesis” (or “enlarged right parenthesis”)