I’m translating an academic paper on image registration.  The paper is published online as a PDF by E. V. Mjasnikov at Samara State Aerospace University, but I what I wanted was a Word document.  I thought I’d give ABBYY PDF Transformer 3.0 a whirl.  Fail.  It destroys mathematical symbols and formulae.  Not the right tool for the job.  For example, this equation for the mutual correlation between two images

becomes this:

II /i (ti, t2 ) / 2 (ti -Ti, t2-T2 ).

Of course, that was before I realized that I needed to add Greek to the list of PDF Document Languages:

While that improved the results, it did not satisfy me.  The improved-yet-unsatisfactory results follow:

ΣΣ⁷ι (‘ι,’2)12 (‘ι-τι,h-Т2)

C (τι,

ΣΣ⁷2² (‘ι -τι,’2 -^τ2)

If ABBYY’s PDF Transformer 3.0 is not the right tool for the job, what is?  Any suggestions?