Regardless of propagandas against Shi’aa, we believe that this Qur'an which is in our hands and other Muslims of the world is exact the same Qur'an which descended to our holy Prophet (s.a.) and not even a word of that has been changed, added or reduced.
We have written this matter clearly in lots of our books in essentials, interpretation and other subjects and proved it by logical and cited proofs.
We believe that, in consensus of Muslim scholars (Sonni and Shi’aa), nothing has been added to Qur'an and most of researchers of both sides say that nothing has been reduced from it.
Some persons of both groups believe that something reduced from Qur'an, which their expressions are not reliable to famous scholars of Islam.