textcolor{green}{+5}\\\\
                \\frac{\\enclose{updiagonalstrike}[4px solid rgba(205, 0, 11, .4)]{2}x}{\\textcolor{green}{\\enclose{updiagonalstrike}[4px solid rgba(205, 0, 11, .4)]{2}}} &= \\frac{12}{\\textcolor{green}{2}}\\\\
                x &= 6
            \\end{aligned}`,
          },
        ],
        'Left/Right': [
          {
            pic: 'left-right-2.gif',
            title:
              'Evaluation at limits (<kbd>\\left</kbd>...<kbd>\\right</kbd>)',
            latex: `\\left.