YOU SAID:
i helped my firend do her math
INTO JAPANESE
私の友人が彼女の数学をするのを手伝った
BACK INTO ENGLISH
Helped my friend do her math
INTO JAPANESE
私の友人が彼女の数学をするのを手伝った
BACK INTO ENGLISH
Helped my friend do her math
That didn't even make that much sense in English.