Question

Hi, I need help to make a logo by using 3 different types of functions and no fewer than 4 functions in all

functions i can use: I can use: linear functions, the absolute value function, the greatest-integer functions, exponential functions, logarithmic functions, sine functions, cosine functions, tangent functions, secant functions, parametric functions and polar functions

this is an example http://www.youtube.com/watch?v=sF5HG7x6h1k