Ruling on combining multiple recitations in prayer?

Question:
Reciting in prayer by mixing the seven canonical recitations within a single surah?

Answer:
It appears to me that this is not advisable; one should recite using only one recitation: either this one or that one. However, since the mushaf is now in the hands of people, one should recite according to what is in the hands of the people, so that the prohibited matter of dispute and disagreement does not occur.
As for if it is for the sake of teaching, teaching them the seven canonical recitations or the ten canonical recitations, there is nothing wrong with it for the sake of teaching; it is a broad matter.