Joke Collection Website - Talk about mood - Dy is the most popular.

Dy is the most popular.

Function y = e x, no matter how many times you take the derivative of x and integrate it, the result is still e x, so it is said that "the world is invincible". But when y = e x takes the derivative of y (d/dy represents the derivative of y), the result is directly 0, so I can kill you.

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