A Writ, Me Tick

One train leaves from point A,
travelling east.
Another leaves at the same time from point B
travelling west.
I am on one of them
You, on the other.

A short subtraction, long division
It never adds up.
I multiply you
a thousand times,
exponentially in essence;
in a sense, innocence.

When will x equal y,
why do I try
when all I get
are derivatives
random variances
of you?

Solve my problem,
please
It's all I ever ask of you
And when two trains
collide,
It will be
an improbability.