Is it acceptable to use MS Equation 3.0 for a journal paper? The title sums it up pretty well. I'm using MS Word to write a paper I intend to publish in a SCI journal. It will contain ~15 equations (non-trivial ones: integrals, sums, fractions, special characters, etc.). I'm fairly efficient in Word, but have absolutely no experience using LaTeX.
Please correct me if I'm wrong, but I'm under the impression that once a paper is accepted, it is edited to conform with the journals publishing style, as opposed to some conferences, I attended, which provide a pre-formatted Word document in which I have to place my work before applying to the conference. As the journal provides no such template (but accepts .doc format), I was wondering if there could emerge any issues regarding the equations.

PS: the field is computer science
If they accept .doc probably they also accept MS Equation. However, the best you can do is ask them directly.

Anecdote: A couple of years ago I prepared the proceedings for a major CS conference. We had about 120 accepted papers and only one of those was written in MS Word.