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<script>
document.addEventListener('DOMContentLoaded', () => {
let a = document.createElementNS('http://www.w3.org/1998/Math/MathML', 'math')
a.setAttribute('scriptlevel', '127')
let b = document.createElementNS('http://www.w3.org/1998/Math/MathML', 'mstyle')
b.setAttribute('scriptlevel', '+2147483645')
a.appendChild(b)
document.documentElement.appendChild(a)
})
</script>