YOU SAID:

I need to study for math, but I won't because I'm lazy

INTO JAPANESE

数学の勉強しなければなりませんが、私は怠惰なので

BACK INTO ENGLISH

Mathematics should be studied, but I was lazy

INTO JAPANESE

数学を勉強する必要があります、しかし、私は怠け者だった

BACK INTO ENGLISH

Have to study math, but I was lazy

INTO JAPANESE

数学を勉強する必要があるが、私は怠け者だった

BACK INTO ENGLISH

Need to study math, but I was lazy

INTO JAPANESE

数学を勉強する必要がありますが、私は怠け者だった

BACK INTO ENGLISH

Need to study math, but I was lazy