If ax² + bx + c = 0 then x = (-b ± (b² - 4ac)^½) / 2a

What about this?

If ax**2 + bx + c = 0 then x = (-b +/- (b**2 - 4ac)**(1/2)) / 2a

Hint: View the source file for this document, and compare the code that generated the two versions. Then take a few moments to think about some of the relevant issues. Can you see where they generate the same results ... in some browsers? Can you see where they are actually different? If you are using one of the editors that "writes HTML code automatically," can you figure out how to generate notation like this using it? What about an expression that is more visually complicated? How easy is your editor to use? Now satisfactory are the results? What other issues should you be considering?

The HTML code for inserting an entity has the following components:

• an ampersand
• either
  • a hash mark followed by the character number, or
  • the character name (much less support for this)
• a semicolon

• © is generated by &#nnn; for nnn=169
• & is generated by &xxx; for xxx=amp

• Character Entities in HTML
• HTML ASCII
  This is a complete ASCII table for HTML, with all the HTML special characters. It is useful for inserting special characters, and spaces, in web pages.
• ISO8859-1 (Latin-1) Table