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Let's see.
Let me try.
I found this on the internet.

integral(e^(x)) = e^(X) + c.
diff(e^(x)) = e^(x)

e^x and c have a walk together in the park. Suddenly c says: "Oh damn, there's a differential operator over there. If he sees me, I vanish." e^x responds: "Don't worry. Just multiply yourself to me, then nothing can happen." So they walk together to that differential operator and say: "Hey, we're c * e^x." The operator replies: "Nice to meet you, I'm d/dy."

At a party of mathematical functions, e^x is sitting alone in the corner. Some other exponential functions, among them 2^x, walk over to e^x. 2^x asks: "Hey e^x, why are you sitting alone in the corner? Come on, integrate yourself!" e^x replies: "Why? It doesn't change anything."

CHILD: Can my friend come over and play.
PARENT:Who is it.
CHILD: the square root of -1.
PARENT: You and your imaginary friends.

Let ε < 0.

(Sorry, but someone had to do it.)

Well, if we're already at that level... Now I need LaTeX notation to say this: \bar{\pi}.

And what's the volume of a pizza of height a and radius z? Answer: pi z z a.

"Nice to meet you, I'm d/dc."