YOU SAID:
so you had a bad day do a math problem
INTO JAPANESE
あなたは数学の問題をやって悪い一日を過ごしました
BACK INTO ENGLISH
You had a bad day doing math problems
INTO JAPANESE
あなたは数学の問題をやって悪い一日を過ごしました
BACK INTO ENGLISH
You had a bad day doing math problems
That didn't even make that much sense in English.