       },
          {
            title: '<kbd>\\underset</kbd>',
            latex: `f(x) \\underset{x \\to 0}{=} x^2 + o(x^2)`,
          },
          {
            title: '<kbd>\\overset</kbd> and <kbd>\\underset</kbd>',
            pic: 'under-over.gif',
            comment:
              '\\def\\stackrel#1#2{\\mathrel{\\mathop{#2}\\limits^{#1}}}',
            latex: `\\begin{aligned}
    A \\underset{\\text{below}}{\\overset{\\text{above}}{+}} C\\
    A \\mathop{+}_{\\text{below}}^{\\text{above}} C
\\e