Here is one feature that I really think needs to be implemented in Math: When you are editing a formula and you select a number you just entered, you should just be able to then click the ({a} over {b}) button (or similar buttons) and then have the program automatically add the selected number to the formula. Currently, it just removes the number, then adds the formula with the placeholders {<?>}.
Please do not reply to this email unless you need to ask a question or you want to let me know that you have fixed the problem and a new version is available for download. Thank you, Nthn