After analyzing different functions, I have identified the following two functions which have similar cool and wavy graph characteristics as the given function:

f(x) = sin(x) + sin(3x)/3 + sin(5x)/5
f(x) = sin(x) + sin(4x)/2 + sin(7x)/3

Upon comparing these functions with the given function, I have determined that the coolest and waviest graph is achieved with the function:

f(x) = sin(x) + sin(2x)/2 + sin(3x)/3
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