YOU SAID:
Calculus is a pain in my posterior
INTO JAPANESE
結石は私の後部の痛みです
BACK INTO ENGLISH
Calculus is a pain in my back
INTO JAPANESE
微積分は背中の痛みです
BACK INTO ENGLISH
Calculus is a back pain
INTO JAPANESE
微積分は背中の痛みです
BACK INTO ENGLISH
Calculus is a back pain
You've done this before, haven't you.