This is an example of using TEXaide (a free software program) that you can use to type formulas into your wiki.cooltext87046837.png

How To -
  1. Open up TEXaide
  2. Type in your formula
  3. Copy the formula
  4. Click to edit your Wiki page
  5. Type in the math tag - [[math]]
  6. Paste in the formula
  7. Get ride of the unwanted text
  8. Type the math tag to end the formula
  9. Save your page

You can also use GeoGebra which is a free and multi-platform dynamic mathematics software for schools that joins geometry, algebra and calculus.