You bothered me most,
The things the world can boast,
Thy significance and importance,
Will always be our acquaintance.
Nothing in this world can compare thee,
Thy uses to physics and chemistry
Easy solutions are offered to me,
Alternative to clumsy algebra and trigonometry.
In real life situation,
Thy examples and explanations,
We cannot have dx/dt,
If we don't have f(t).
There is no differentiation
If there is no integration
The limits and the functions
Is the course of our vocation.