RunKit + npm: markdown-it-mathjax-svg-next

const md = require('markdown-it')().use(require('markdown-it-mathjax-svg-next')); var mathjax = md.render(` # markdown-it-mathjax-svg-next! ## Inline Formula \`\`\` mathjax When $a \\ne 0$, there are two solutions to \\(ax^2 + bx + c = 0\\) and they are $x = {-b \\pm \\sqrt{b^2-4ac} \\over 2a}.$ \`\`\` ## The Lorenz Equations \`\`\` mathjax $ \\begin{align} \\dot{x} & = \\sigma(y-x) \\\\ \\dot{y} & = \\rho x - y - xz \\\\ \\dot{z} & = -\\beta z + xy \\end{align} $ \`\`\` `);