Why all the fuss?
Having trouble with calculus?
When dividing a number that may vary,
it needn't be so scary -
such division, not so primitive,
is called a derivative,
and the inverse of that operation,
a new-fangled multiplication,
which, by storm, is taking the nation,
by the name of integration.
If you disagree, and are disputin',
take it up with Isaac Newton....
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