How to display simple mathematical formulas in a rich internet application

I have some mathematical formulas of the type

p = (l + m + n) / (i+j*2) 

Note: This is just an example. The real equations are more complicated with several variables participating in the equations.

I want to display these formulas in a tree like structure in an interactive, rich web component.

Initially the screen should display

p = x/y

with p, x and y as boxes. The user can click on the box labeled x which will "unfold" the box to expand and display x = (l + m + n) and so on.

Since this i开发者_运维知识库s a J2EE based application, I can use any RIA library compatible with J2EE.

Are there any 3rd party RIA libraries out there that can help me render these formulas?

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Looks like MathOverflow has this down... check it out.

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please see the below links:

http://www.math.union.edu/~dpvc/jsMath/examples/Henrici.html

http://www.myphysicslab.com/web_math.html

http://amaya.software.informer.com/11.1/

http://en.wikipedia.org/wiki/MathML