there should be more time because its hard to write out these equations. also it took me a couple second to realize what you wanted (derivative, indefinite integral...) and the command form derivative is derive not derivate
The description should say "DIFFERENTIATE these FUNCTIONS in under 30 seconds". I might suggest making a longer quiz with like 20 questions of different types (trignometric, logarithmic, exponential, rational functions, etc...), with more time of course.