E1: Study all predefined base functions of the ComboBox without selecting derived functions, varying the relevant parameters. Do not shy away from using extreme values for parameters, adjusting coordinate intervals to the ordinate range, if appropriate.
Try to get a secure judgment of the character of these functions.
E2: Study single base functions and their derivatives. Adjust scales in such a way that all curves are visible in the coordinate field. Study the progression of derivatives and antiderivatives and try to reconstruct them mentally from the course of the base function. Vary parameters!
E3: Change predefined functions by editing their formula. Don´t forget to press the ENTER key after a change. As a byproduct, you will get experience in common mistakes in editing, in writing proper syntax for formulas, and in scaling.
E4: Experiment with new formulas of your own interest. You can use constants in them to achieve proper scaling.