YOU SAID:

i was at a birthday party with an elephant and a horse and nobody noticed them

INTO JAPANESE

私は象と馬と誕生日パーティーにいたが、誰もそれらに気づかなかった

BACK INTO ENGLISH

I was at a birthday party with elephants and horses, but no one noticed them

INTO JAPANESE

私は象と馬と一緒に誕生日パーティーに出席していましたが、誰もそれらに気付かなかった

BACK INTO ENGLISH

I was attending birthday parties with elephants and horses and no one noticed them

INTO JAPANESE

私は象や馬と一緒に誕生日パーティーに出席していましたが、誰もそれらに気付かなかった

BACK INTO ENGLISH

I was attending birthday parties with elephants and horses and no one noticed them