How can I zoom a Latex maths formula to XXL for a pasting it as image into a presentation slide?

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6

After some searching I found two online converters that produce the desired result:
LaTeX to SVG and Convert LaTeX to SVG.

I found no operative app for installation on Manjaro Linux KDE-Edition.
Both the app KLatexFormula and the LibreOffice extension KLaTexFormula give an error when trying to export as an image: LaTeX Error: File `article.cls’ not found.