I have created maths with Texmaths as PNG , how can i copy now my text and paste it not as a text with PNG images, but as a pure text + latex code text.
If your formula is a PNG, it is simply an image. You can’t recover the maths from it.
If you know how to write formulas in LaTeX, install an extension handling this script.
Otherwise, Insert>Formula (which launches Math, the formula editor) and design your formula. Warning! Math script is not the same as LaTeX, nor MathML. Get the MathGuide to learn the script.
PS: when asking here, always mention OS name, LO version and save format.
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