You do not need to leave InDesign entirely. Use as your external math engine.
If you need automated rendering within the Adobe ecosystem, you can check the Adobe Exchange marketplace for specialized SVG and MathML utilities. Math Pro (Adobe Exchange) indesign math plugin free
While most professional plugins cost hundreds of dollars, (often referred to under the "Indiscripts" or specialized script umbrellas) offers a powerful scripting alternative. You do not need to leave InDesign entirely
It supports direct LaTeX code pasting and offers a smart keyboard for common operators. indesign math plugin free