YOU SAID:
it needs to be grammatically complex and missing punctuation
INTO JAPANESE
文法的に複雑で句読点が欠けている必要があります
BACK INTO ENGLISH
It is grammatically complicated and needs to be missing punctuation marks
INTO JAPANESE
それは文法的に複雑であり、句読点を欠いている必要があります
BACK INTO ENGLISH
It is grammatically complicated and must lack punctuation
INTO JAPANESE
文法的に複雑で、句読点を欠いている必要があります
BACK INTO ENGLISH
It is grammatically complicated and must lack punctuation
You've done this before, haven't you.