\newcommand{\Bold}[1]{\mathbf{#1}}\left(\begin{array}{rrrrrrr} 1 & 0 & -1 & 1 & 3 & 5 & -1 \\ -1 & 1 & 2 & 3 & -2 & 4 & 2 \\ -2 & 0 & 0 & 6 & -2 & 3 & 0 \\ 0 & 1 & -1 & 6 & 1 & -1 & 3 \\ 3 & -1 & 0 & 4 & 1 & -2 & 1 \\ 1 & -1 & 4 & 3 & 2 & 4 & 3 \\ -1 & -1 & 4 & -6 & -1 & 1 & 6 \end{array}\right)
 \newcommand{\Bold}[1]{\mathbf{#1}}\left(\begin{array}{rrrrrrr} 0 & 0 & 0 & 0 & 0 & 1 & 0 \\ 0 & 0 & 1 & 0 & 0 & 0 & 0 \\ 0 & 0 & 0 & 1 & 0 & 0 & 0 \\ 0 & 0 & 0 & 0 & 0 & 0 & 1 \\ 1 & 0 & 0 & 0 & 0 & 0 & 0 \\ 0 & 0 & 0 & 0 & 1 & 0 & 0 \\ 0 & 1 & 0 & 0 & 0 & 0 & 0 \end{array}\right) \newcommand{\Bold}[1]{\mathbf{#1}}\left(\begin{array}{rrrrrrr} 1 & 0 & 0 & 0 & 0 & 0 & 0 \\ -\frac{1}{3} & 1 & 0 & 0 & 0 & 0 & 0 \\ -\frac{1}{3} & -\frac{1}{2} & 1 & 0 & 0 & 0 & 0 \\ -\frac{2}{3} & \frac{1}{2} & -\frac{1}{2} & 1 & 0 & 0 & 0 \\ \frac{1}{3} & \frac{1}{2} & \frac{1}{2} & \frac{1}{4} & 1 & 0 & 0 \\ \frac{1}{3} & -\frac{1}{4} & 0 & -\frac{1}{8} & \frac{9}{14} & 1 & 0 \\ 0 & -\frac{3}{4} & \frac{1}{2} & \frac{1}{8} & \frac{1}{2} & -\frac{217}{275} & 1 \end{array}\right) \newcommand{\Bold}[1]{\mathbf{#1}}\left(\begin{array}{rrrrrrr} 3 & -1 & 0 & 4 & 1 & -2 & 1 \\ 0 & -\frac{4}{3} & 4 & -\frac{14}{3} & -\frac{2}{3} & \frac{1}{3} & \frac{19}{3} \\ 0 & 0 & 4 & 2 & -2 & \frac{7}{2} & \frac{11}{2} \\ 0 & 0 & 0 & 12 & -2 & \frac{13}{4} & \frac{1}{4} \\ 0 & 0 & 0 & 0 & \frac{7}{2} & \frac{31}{16} & -\frac{53}{16} \\ 0 & 0 & 0 & 0 & 0 & \frac{275}{56} & \frac{135}{56} \\ 0 & 0 & 0 & 0 & 0 & 0 & \frac{469}{55} \end{array}\right)