Math Thoughts

Subtraction must be in a certain order---
Or you can just add with negatives.
Likewise, a function can express a line or curve,
And understanding this can derive an exact area
For what is underneath it, or the curve itself.
The limit is the exact ratio, of the division of the function,
Which the function is explained through multiple
Trigonometric variables.
And we can combine these, to calculate the whole curve
And then take those variables, and calculate another curve.
What a wonderful world it would be?