YOU SAID:
Hello , mathematics is the best subject ever!
INTO JAPANESE
こんにちは、数学は史上最高の科目です!
BACK INTO ENGLISH
Hello, math is the best course ever!
INTO JAPANESE
こんにちは、数学はこれまでで最高のコースです!
BACK INTO ENGLISH
Hello, math is the best course ever!
That didn't even make that much sense in English.