@Claudio Marconato, thanks for asking. I am afraid MathMagic is mentioned too often lately but I guess it is OK to answer you because this info is publicly available many places.

As you can find from the attached screenshot, MathMagic is available through InDesign's Plug-ins menu, or right-button clicked contextual menu, or InDesign's toolbar on the left bottom.

To add a new equation, you can simply select "New Equation". To re-edit an equation, you can simply double-click on it.
Inserted equation in a text box as an inline object will automatically align its baseline to the text baseline.
As explained below, MathML or LaTeX / Plain TeX and other info can also be converted or inserted.

If you need to change the font or size or other style of your equations in the whole InDesign doc or in a certain range or pages, a new Style can be applied to all those equations at once. For example, when your InDesign's body text need to change its font or size, all equations can also be changed accordingly quickly.

All equations are placed in EPS format so InDesign handles them natively. So you do not need MathMagic application or plugin installed, if you do not need to create or reedit equations. Your InDesign documents with MathMagic equations can be shared with other designers or printing service bureau without asking them to install MathMagic, and future versions of InDesign can handle the those equations even if MathMagic is not installed.

Overall, MathMagic should just work seamlessly, like a part of InDesign's builtin feature.
Hope this answered you.

@MathMagic Support, so with MathMagic Pro on macOS there's a good integration with InDesign?

@Raja, Gejaraj: Thank you. If you have a Mac, and would like to test the current MathMagic Pro on macOS, please send us a brief email to support@mathmagic.com. We would like to offer you an Evaluation copy.

@MathMagic Support: yes, it was tested long-back in Windows with trial version first and then bought 1 license (looking for the name of purchase as we changed our corporate name thrice later)

@Raja, Gejaraj
May we ask when you tried MathMagic because we could not find your name from our database for the last 10+ years.
Was it just a Trial version with limited features? Or, purchased under a different name?

@All: like to share the collective details on the challenges we're facing in different 3rd-party tools, please let me know, if anyone required additional details:

(1) PowerMath: Need to follow different coding structure than MathML or TeX/LaTeX, outdated and our client is requesting not to use this plug-in for their projects

(2) MathMagic: Explored this, but not up to the mark, challenges in hanging and much more, also cost is much higher than InDesign license cost

(3) InMath (then) / MathTools (now): Few clients preferred this and now dropped due to less support, not user friendly, licenses getting inactivated frequently, also cost is much higher than InDesign license cost

(4) MathType: Currently using for many of our clients, but challenges in handling complex equations, also rendering as images, due to that difficult in setting the equations across the pages and spreads, MathML extraction not up to the mark and much more

So finally, Adobe should have in-built MathML support to cover all the possibilities and without the above mentioned challenges.

无法相信，作为一个排版软件，迭代了这么多个版本，居然还不支持公式，现在在线文档编辑器几乎都是标配了。
I can't believe that as a typesetting software, after iterating through so many versions, it still doesn't support formulas. Nowadays, online document editors are almost standard.

We need this!

If you'd like to see the Conversion of MathML block to an Equation on the fly... screenshot attached.

Please make sure the Smart Quotes are not enabled and not used in the MathML expression.

For those who need to convert MathML into equation within InDesign document....

MathMagic Pro supports converting the MathML expression block or LaTeX expression within a text box into an equation. It will automatically search the block around the cursor or just convert the selected text block into math equation, in EPS format.
The equation can also be converted to other formats such as SVG, PDF, MathML, LaTeX, PNG, JPG, ..., as necessary.
Inserted equations in a text box as inline graphics automatically align its baseline to the text baseline.
Free trial can be used to see the features.

For an evaluation copy to test for a longer period, please contact us: support at mathmagic.com

Yes, I too agree to bring this feature from FrameMaker to InDesign, will be more good to continue with InDesign

Yes, from the very beginning of InDesign's history, I wish there was support for a set of scientific formulas. Frame-Maker is very old now and completely inconvenient, in my opinion, not equal to InDesign. It would be interesting to combine their capabilities...

Then, Adobe is promoting FrameMaker than InDesign? Definitely not, also FrameMaker not supporting MathML, but only the math expressions.

@Adobe: please respond

If Adobe allows InDesign to work with full-off math texts, then it will become a competitor for the Adobe Frame Maker application, so it is absolutely impossible...

It's requested 6 years back, but no response / action from Adobe

Issue importing MsWord field code in Indesign

I currently have to export images from MathType for use in InDesign. Onerous process.

We need to make formulas in Indesign, equations, square root, etc.

We need math equation capabilities within InDesign ASAP.

@Adobe: not sure Adobe is serious about this request, since this is pending for a long-time, but much needed one. Due to this limitation, our clients/authors are started moving into another platform, such as TeX/LaTeX, which is actually free and rendering the math expressions in great manner.

If Adobe is still delaying, licenses count will be reduced much in the future. So please respond and comeback quickly with the updates.

Hope all the InDesign group supporters/users, will accept this.