This site is an attempt to help all such sites render formulas. You have two methods of generating formulas:

• For static content:(webpages that do not change over time) visit this page (bookmark it) and type your formula in the box below. Right-click on the generated image and save it on your hard drive. Then refer to it as you would refer to any other image, via the IMG SRC tag.
• For dynamic content:(generated by user request "on the fly") you can generate your IMG SRC tags on the fly. You should call script http://www.algebra.com/cgi-bin/plot-formula.mpl. You also have to add a question mark to it and then "expression=" and URLEncoded parameter expression. Example of pseudocode:

        url_base = "http://www.algebra.com/cgi-bin/plot-formula.mpl";
        expression = "ax^2+bx+c";
        full_url = url_base + "?expression=" + encode_url( expression )
  
        print "<IMG SRC=" + full_url + ">"
  

See this extensive page on help with formulas.

Help:

• To render square root, use the sqrt symbol. Example: sqrt( b^2 - 4ac ).
• To render powers, use the ^ character. E.g., to render x squared, you would enter x^2.
• You absolutely must use brackets with functions. sin x will NOT work! sin(x) will work.
• to render integrals, use function int( x^2, dx, 0, 1) for definite integrals, int( e^(-x^2), dx ), for indefinite integrals.

• To render summations, enter something like sum( 1/i!, i=0, infinity ). The first parameter is what you sum, and the second and third are bounds.
• You can use factorial character !. If you say infinity (like in integral bounds or in summation), the infinity character will be painted.
• To plot graphs, enter: graph( 600, 400, -10, 10, -10, 10, x-2, x^2+3*x)
• To plot number line, enter: number_line( 600, -10, 10, -1, sqrt(3), (6.5), (20-13) )
• Regression Test -- many more examples

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