YOU SAID:

I have a major in Mathematics and a minor in bed

INTO JAPANESE

私は数学を専攻し、副専攻はベッドにいます

BACK INTO ENGLISH

I'm a math major and my minor is in bed

INTO JAPANESE

私は数学専攻で、副専攻はベッドにいます

BACK INTO ENGLISH

I'm a math major and my minor is in bed