To Create a Symbolic Function
For this procedure you need to have opened the Function Definition dialog box and completed the preliminary steps.
2. Click Available Function Components to display the Symbolic Options dialog box.
3. Build your symbolic expression by clicking a variable and the appropriate constant, operator, and function. Clicking an item in any field displays the item in the Symbolic entry box on the Function Definition dialog box. Alternatively, you can type a function in the entry box using the options shown on the Symbolic Options dialog box.