Create a math problem that exhibits the basics of calculus, but is also a clever allusion to the cosmic joke that is existence.
Let f(x) represent the grand plan for the universe, and g(x) represent the chaotic and unpredictable nature of reality. The derivative of f(x) with respect to x represents the order we try to impose on our lives, while the derivative of g(x) represents the randomness and absurdity we encounter. 

So, the equation becomes:

[f(x) + g(x)]'(x) = f'(x) + g'(x)

This equation demonstrates the basics of calculus, with the addition of acknowledging the cosmic joke that despite our attempts at order and predictability, the randomness of existence will always be present.
It would be better if you can give a good example
Sure, here's a math problem that might fit the bill:

Suppose you are standing at a point (x, y) on a two-dimensional plane, representing your position in space at a given moment in time. You suddenly start moving in a straight line towards a point (a, b) at a constant velocity v, where a and b are constants representing a predetermined destination.

Now, imagine that your position at any given moment in time can be described by the function f(t), where t is time. To determine the function f(t) that describes your movement towards the point (a, b), we need to use calculus.

The function f(t) can be expressed as the integral of a rate of change function, which represents the velocity at which you are moving towards the point (a, b). This rate of change function can be determined using the Pythagorean theorem and the chain rule:

f'(t) = sqrt((a-x)^2 + (b-y)^2) / v

Integrating f'(t) with respect to t gives us the function f(t) that describes your position in space as you move towards the point (a, b):

f(t) = (1/v) * ∫sqrt((a-x)^2 + (b-y)^2) dt

However, as you continue to move towards the point (a, b), you begin to realize that the closer you get, the farther away it seems to be. No matter how much you move towards it, the distance between you and your destination never seems to shrink to zero.

This is a clever allusion to the cosmic joke that is existence: no matter how much we strive towards our goals, no matter how much progress we make, there is always an infinite distance between us and true fulfillment. In other words, the journey towards our goals is often more important than the destination itself.