Getting Started
When you first open the program there will be a blue box on the screen. You can click on this box and input a character using 3 different modes: speech, handwriting, and keyboard input. If you speak a phrase, type a character, or write a character on the screen the corresponding symbol will be displayed in the box and it will now be the selected symbol. When a symbol is selected it will display three blue boxes to its right, these are called colorboxes. The upper colorbox represents the exponent field, the lower is the subscript, and the colorbox immediately to the right is the next field.
By clicking in these colorboxes and inputting a character with one of the three input methods, a new symbol will be displayed in the colorbox, and that symbol will be selected. You should continue clicking and inputting characters until the math expression resembles what you are trying to create. Once you reach that point you can either save your expression as MathML or Tex. The commands to do this are found in the File menu.
Before you start, you should also make sure you have the necessary System Requirements.