Sorry, maybe I misunderstood what the issue is - I was getting the impression that @phaedo1732 's tool wasn't handling matrix equations for you. Are you just having a problem with how FM to MIF handles them? In that case, sure try hitting up the FM folks - see https://helpx.adobe.com/contact/enterprise-support.other.html#framemaker for your Adobe Support options. I'd recommend using the tcssup@adobe.com e-mail address as it reaches a team dedicated to Technical Communication Suite products including FrameMaker.
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