Functional relationship

If only I could get to the derivative of you,
To navigate your slope just like I used to do,
Your sine curve so smooth, so well elevated,
Just waiting for me to come and make it integrated.
Remember how during our second differentiation,
I'd derivate and agitate until I'd reach acceleration?
My little pet parabola whom I so much adore,
Why can't we have a functional relationship once more?