YOU SAID:

I have to go to school on friday and do maths

INTO JAPANESE

私は金曜日に学校に行き、数学をしなければならない

BACK INTO ENGLISH

I have to go to school on Friday and do math.

INTO JAPANESE

私は金曜日に学校に行って数学をしなければならない。

BACK INTO ENGLISH

I have to go to school and do math on Friday.

INTO JAPANESE

私は金曜日に学校に行って数学をしなければならない。

BACK INTO ENGLISH

I have to go to school and do math on Friday.