    title: '<kbd>\\left</kbd>......<kbd>\\right</kbd> with superscript',
            latex: `\\left(x\\right)^2`,
          },
          {
            title: 'Nested <kbd>\\left</kbd> <kbd>\\right</kbd>',
            latex: `\\left[\\left(\\frac{1}{x}\\right) + \\dfrac{2}{\\dfrac84}\\right]`,
          },
          {
            title: 'Unbalanced <kbd>\\left</kbd> <kbd>\\right</kbd>',
            latex: `a\\right) b \\left(c`,
          },
        ],
        'Operator': [
          {
            title: 'Op