Final-changes-before-9-26-meeting

[Samuel-Lubliner]

@Zune-Ahmed I made changes to your following sections from last semester. Please let me know if you have any questions about these changes:

Mostly, I made the examples more inline with the documentation, reformatted and refactored:

Combinatorics:

• Add math mode to numbers within a paragraph
• Use .list() instead of for loop to show the elements

Lattices:

• add term tags
• Define the lattice with elements and relations per the documentation.

Lattice operations:

• Refactored:
• Obtain matrix values with the Sage built in linear_extension()
• Display table with pandas DataFrame

Logical Operations:

• Add code tags