You're delusional.
You really think that the entirety of the world's professional mathematicians, physicists, engineers, computer scientists, statisticians, chemists, economists and everybody else who use calculus in their work or has even passing familiarity with it are wrong, while you with (I'll wager) no formal training or working experience with calculus, is right?
This is not one of those things where we get to be wrong with no or little influence on how the world functions: If you were right, the computer in front of you wouldn't work, because its function (as well as the function of a multitude of objects you interact with on a day-to-day basis) is predicated on the correctness of calculus.
Beer w/ Straw's suggestion is actually very good: Plug in some test values and see if it makes sense. A lot of mathematicians do it when they get a hunch at some particular relationship. I do it all the time, myself.
Also, ban request: mishin05. Let us suffer fools no more!