NOTES FOR APRIL 19-21, 2017
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How might we encode polynomials in Python? 
See Pages 272-275 in the Companion

For example:
		f(X) = 4X^5 - 3X^4 + 2X^3 + 7X - 6
Possibility #1:
   [[4,5], [-3,4], [2,3], [7,1], [-6,0]]
Possibility #2:
   {4:5, -3:4, 2:3, 7:1, -6,0}
Possibility #3:
   [-6, 7, 0, 2, -3, 4]

How, then do we do the following things?
0: Normalize a polynomial (make sure upper coefficients aren't 0)
1: Make a string from a polynomial
2:	Add/Subtract two polynomials
3: Multiply two polynomials
4: Divide one polynomial by another (ugly)
5: Differentiate a polynomial
6: Integrate a polynomial
7: Evaluate a polynomial at a particular value of X