Let me tell you the reasons that I don't agree with you.

Source: Tatoeba

I do not agree with you at all.

Source: Tatoeba

To tell the truth, I don't agree with you.

Frankly speaking, I don't agree with you.

Source: Tatoeba

I don't agree with you smoking.

Source: Tatoeba

I don't agree with you on this point.

Source: Tatoeba

I'm sorry I don't agree with you on that matter.

Source: Tatoeba