Typo: SympyIntro: <Descriptive title here>

[KadenParker1]

Typo Details:

Docstring has us calculating the eigenvalues and vectors of a 3x3 matrix, it appears as a 3x4 here and we need a square matrix to find eigenvalues and vectors.

Suggested Fix:

[x-y,   x,   0]
    A = [  x, x-y,   x]
        [  0,   x, x-y] add parenthesis to the latex around the x-y's so it follows the matrix there.

Source Lines

Relevant segments in `/PythonEssentials/SympyIntro/SympyIntro.md`:
- Approximate line: 298:
  - Section: Problem 5:
    - TeX: $\begin{split}
A =
\left[\begin{array}{cccc}
x & -y & x  & 0  \\
x & x  & -y & x  \\
0 & x  & x  & -y \\
\end{array}\right]
\end{split}$ (`\begin{split}
A =
\left[\begin{array}{cccc}
x & -y & x  & 0  \\
x & x  & -y & x  \\
0 & x  & x  & -y \\
\end{array}\right]
\end{split}`)
- Approximate line: 298:
  - Section: Problem 5:
    - TeX: $\begin{split}
A =
\left[\begin{array}{cccc}
x & -y & x  & 0  \\
x & x  & -y & x  \\
0 & x  & x  & -y \\
\end{array}\right]
\end{split}$ (`\begin{split}
A =
\left[\begin{array}{cccc}
x & -y & x  & 0  \\
x & x  & -y & x  \\
0 & x  & x  & -y \\
\end{array}\right]
\end{split}`)