、。
Excuse me, but I'd like to point out three errors in the article above.
Literal
Impolite [copula-だ-but-が], above-listed article [location-に] exist 3 [counter of-つ] errors [object-を] point-out-put [polite-want-たい].
A compact example of formal/business register. 失礼だが is a polite opening for a slightly critical remark ('forgive my rudeness, but...'). 上記 ('the above-listed') is a formal/written word typical of documents. The auxiliary ~ておく ('do X in advance / do X for future reference') combines with ~たい ('want to') to form 指摘しておきたい — 'I want to (go ahead and) point out.' 3つ uses the native Japanese counter つ.