How do I create a video of typing math symbols I am creating a training video on Calculus using my Mac, and I need to enter mathematical symbols such as integration and summation signs on my video. (The video is just a screen capture of me writing equations in sequence on the screen, until the solution is derived)

I bought a Wacom tablet thinking I would just hand-write everything on a graphics app and capture it in Camtasia. However it is difficult to draw a good looking symbol by hand using these devices

So now I am thinking to use type, but then how do you type an integral between limits without a lot of preparation for each equation, to produce things that look like this or this.

Does anyone know of a good way to type math symbols directly onto a screen in real time (or very near)?

MS Word has an equation editor,  but I would like to type character by character, and the equation editor forces you to set all of the characters and then renders them into a single image.
You could be clearer about what 'on my video' means. Does that mean: composited with other moving pictures in your video; or does it mean: in a sequence all by itself that's edited into your video? Or something else? And what video tools can you use?

For compositing use a compositing tool like Adobe After Effects. After Effects would also be perfect for building the 'typing on' sequence of symbols that you want. 

If you don't have access to After Effects, why not build your sequence as a set of Photoshop layers which you can then export as an image sequence. Import that sequence into Quicktime (Pro), then re-export as a .mov using a codec that makes sense for you project. If you don't have access to Photoshop you can still do this with any cheap graphics software. Just 'manually' output identically sized images and name your output files sequentially. Tell Quicktime Pro to import them as a sequence.

Another idea:


create a single good image (similar to the ones that you provided links for) of the complete expression or equation that you want to 'type on' the screen.
import into Adobe Illustrator or PhotoShop.
create a series of white 'masks' (just rectangles) to cover each term in the expression or equation) and put each one on it's own layer, in the sequence in which you'll want them revealed. 
De-select the eyeball on each layer, in sequence, to hide the 'mask' for that layer and reveal each term in sequence. Run Camtasia as you do this and you'll have the 'typed-on' movie you're looking for. You could pre-record your audio so that you'd have a good sense of timing for the reveal of each term.